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Just finalized a deal for a new TTS which I should have by next week.
its only my second Porsche and certainly the highest end Porsche I've had. I did get a chance to drive one very briefly before ordering but it was on busy city roads.
Just wondering if there are any "must haves" aftermarket. I have a 458 Italia and one thing many of us do is an exhaust switch (Capristo) that keeps the exhaust flaps open at all time giving the race sound normally found only after 4000 rpms at all speeds. I searched the forum but it seamed to be filled with dealers selling aftermarket exhaust which I assume voids your warranty?
Anyway, thanks to everyone here for this and any other suggestions.
I think as long as you don't mess with the cats, your warranty should not be affected, but not positive, others who've installed 200 cell aftermarket cats and exhaust i.e. Europipe... might chime in.
I installed a Sharkwerks exhaust but left the cats stock (for now...) and warranty is in full effect.
You might confirm this with your dealer, as all are not the same. Some actually use common sense...
Just finalized a deal for a new TTS which I should have by next week.
its only my second Porsche and certainly the highest end Porsche I've had. I did get a chance to drive one very briefly before ordering but it was on busy city roads.
Just wondering if there are any "must haves" aftermarket. I have a 458 Italia and one thing many of us do is an exhaust switch (Capristo) that keeps the exhaust flaps open at all time giving the race sound normally found only after 4000 rpms at all speeds. I searched the forum but it seamed to be filled with dealers selling aftermarket exhaust which I assume voids your warranty?
Anyway, thanks to everyone here for this and any other suggestions.
I installed Capristo exhaust. I talked with my dealer, it does not void engine warranty, only void exhaust warranty.
Fabspeed has developed some great products for the 2015 991TTS. We have Porsche 991TT High-Quality Performance Sport Headers that provide better boost response and power throughout the RPM Range. Our 991TT Sport Headers feature 3-into-1 high velocity pyramidal investment cast merge collectors for improved exhaust scavenging.
Fabspeed's Sport Headers are constructed from high-quality 14-16 gauge CNC Mandrel Bent T304L stainless steel for optimum flow and maximum durability which means there are no cuts or welds in the piping until the collectors. They are a direct bolt on replacement with no cutting or welding required for installation.
If you're looking for piping further down the exhaust, we also have our 991TT Supersport X-Pipe Exhaust System. Our 991 TT Supersport X-Pipe is a high performance free flowing X-Pipe with Sport Catalytic Converters for improved power and sound. Fabspeed's 991TT Supersport X-Pipe also includes 200-Cell HJS Sport Cats and Deluxe Quad-Style Tips. It Makes a solid +25WHP and +31FT-LbS of TQ.
You will notice dramatic improvement in sports car sound and power throughout the RPM range. The Supersport X-Pipe is also constructed from high-quality 14-16ga C.N.C. mandrel-bent T304L stainless steel for optimum flow and maximum durability and a direct bolt on replacement for the OEM Piping. No cutting or welding is required.
I can't answer for the reliability of the 99tt valved system from crapisto but what I do know is that my friend bought one for his 997tt and got rid of it as it was an ongoing disaster. He then bought a Europipe and never looked back. Interestingly Porsche offers a valved system for their atmo 991 cars but not their 991 turbo's and I suspect that is due to the higher heat loads generated which would be very hard on the valves. If Porsche offered a valved system for a turbo that would be a different story but as they don't ought to tell you something right there. Not to say don't buy a Crapisto but you would certainly want at least a 4 or 5 year warranty on the valves including labor imho. In so far as whether any AM system affects warranty my dealer was more than happy to fit the EP and said the warranty would not be effected. That may vary dealer to dealer though.
I also note FS has openly admitted on the EP thread that their cats can fail during track use which does not surprise me one little bit as I have personally seen some of their products fail on the tarck as well (specifically headers cracking and mufflers blowing out) when I used to be a regular attender. Regardless of their cats being HJS (which are actually re branded 200 emmitec cores) what I can clearly see is they are not insulated against thermal shock like the OEM's. So with no insulation that's a deal breaker for me right there. As you may or may not be aware, the OEM cats are shielded/insulated for very good reason. Porsche engineers know exactly what is required for this car to ensure reliability of the cats! This shielding/insulation requires skill and effort to put there in the first place which costs money... may well answer for why most AM's don't use it Food for thought eh?.
I decided on the EP for my own 991TTS and I can unreservedly say it is absolutely sensational!!.....the best thing I have done to this car period.....worth every penny and then some. But of course each to their own poison!
Fwiw EP cats are also fully insulated/shielded 100 cel emmitec, not 200 cel un-shielded (refer EP website for this info). Porsche also use these same 100 emmitecs on their cup cars so also see them as the best where performance and reliability goes too!
Rcorsa, I’d like to address your warranty question directly…
Installing aftermarket cats should not directly affect your factory vehicle warranty in any way other than for the cats themselves. Per law, according to the Magnusson-Moss Warranty Act, a dealer or manufacturer cannot void a warranty or refuse warranty service based upon the presence of an aftermarket component unless it can be proved beyond any reasonable doubt that the aftermarket component was to blame for the issue. For example, if you install an aftermarket exhaust system and then take the car in for warranty service on a suspension component or a faulty radio, they can’t legally deny you coverage. The aftermarket exhaust system would, of course, not be covered under the factory Porsche warranty, but in the case of all Fabspeed systems, you would be covered by our Lifetime Limited Warranty.
That being said, Fabspeed offers a fantastic exhaust system for these cars that will not only save weight and add noticeable power, but also gives the 991 Turbo a seriously-needed vocal upgrade. The resulting sound is incredible, with an exotic scream under heavy acceleration and an extremely gratifying burble under deceleration and downshifting.
Speed21 mentioned that our cats do not use an insulating heat shield. This is accurate, but for very good reason. During our engineering and development, we worked very closely with HJS, which is one of the most highly-respected manufacturers of catalytic converters in the world. They are an OEM manufacturer and supplier for many exotics such as Ferrari, Lamborghini, and more. Our collaborative testing found that the shielding around the cats was superfluous, and that it added unnecessary cost and weight to the overall system.
Here is a direct quote from an HJS representative who we reached out to regarding these heat shields and the potential for failure due to “thermal shock”:
“The heat insulation has nothing to do with the durability of the catalysts. The insulation is a necessary standard to hold the Euro 5 or Euro 6 emission certification for street cars. HJS manufactures the catalysts for all Porsche racing cars and is the one and only company which is certified by Porsche for the homologation of catalysts for rally and racing cars.” – Klaus Osterhaus, HJS Emission Technology GmbH & Co. KG
Additionally, we have had customers with Fabspeed systems on their cars for decades without having any issues with thermal shock or cat failures, and that includes both street and track use.
It’s important to note, however, that we recommend the use of catbypass pipes for track and race applications. All catalysts, be they OEM or aftermarket, are designed for normal street use and are only installed on street vehicles in order to pass emissions and homologation standards. No catalyst is designed to indefinitely withstand the rigors and abuse of track driving for extended periods of time. We have done countless installations of our Sport Cats for both dealers and private retail customers whose OEM cats have failed under both street and track driving scenarios, some with less than 10,000 miles on the vehicle. The general rule of thumb is that if you want maximum power and sound or have a dedicated track car, you are better-served by removing the catalysts altogether with Fabspeed’s Catbypass Pipes. If you have a street car that sees occasional performance driving schools or open track days and needs to comply with most emissions regulations, then Fabspeed’s Sport Catalytic converters (using HJS catalysts) are likely a great fit for you, and have been time-tested by hundreds of very satisfied owners on both the street and the track for over 20 years on everything from 993 Carreras to 991 Turbos.
Rcorsa, I don’t get the impression that you will be heavily tracking your new 991TT, so the Fabspeed Supersport X-Pipe sounds like it could be a really great fit for you. Shoot me a PM and we can discuss it in more detail if you’d like. I look forward to speaking with you, and congratulations on the new purchase; she’s certainly a beauty!
Speed21 mentioned that our cats do not use an insulating heat shield. This is accurate, but for very good reason. During our engineering and development, we worked very closely with HJS, which is one of the most highly-respected manufacturers of catalytic converters in the world. They are an OEM manufacturer and supplier for many exotics such as Ferrari, Lamborghini, and more. Our collaborative testing found that the shielding around the cats was superfluous, and that it added unnecessary cost and weight to the overall system.
Here is a direct quote from an HJS representative who we reached out to regarding these heat shields and the potential for failure due to “thermal shock”: “The heat insulation has nothing to do with the durability of the catalysts. The insulation is a necessary standard to hold the Euro 5 or Euro 6 emission certification for street cars. HJS manufactures the catalysts for all Porsche racing cars and is the one and only company which is certified by Porsche for the homologation of catalysts for rally and racing cars.” – Klaus Osterhaus, HJS Emission Technology GmbH & Co. KG
Additionally, we have had customers with Fabspeed systems on their cars for decades without having any issues with thermal shock or cat failures, and that includes both street and track use.
It’s important to note, however, that we recommend the use of catbypass pipes for track and race applications. All catalysts, be they OEM or aftermarket, are designed for normal street use and are only installed on street vehicles in order to pass emissions and homologation standards. No catalyst is designed to indefinitely withstand the rigors and abuse of track driving for extended periods of time. We have done countless installations of our Sport Cats for both dealers and private retail customers whose OEM cats have failed under both street and track driving scenarios, some with less than 10,000 miles on the vehicle. The general rule of thumb is that if you want maximum power and sound or have a dedicated track car, you are better-served by removing the catalysts altogether with Fabspeed’s Catbypass Pipes. If you have a street car that sees occasional performance driving schools or open track days and needs to comply with most emissions regulations, then Fabspeed’s Sport Catalytic converters (using HJS catalysts) are likely a great fit for you, and have been time-tested by hundreds of very satisfied owners on both the street and the track for over 20 years on everything from 993 Carreras to 991 Turbos.
You speak of FS's engineering and development in conjunction with HJS but what did that actually entail? Did FS conduct any emission compliance testing using the cats you are selling on the specific cars you are selling the systems for? And if so what were the results? Did you conduct any premature cat failure scenarios at all? This is what manufacturers usually conduct when they are designing and developing a product so that way they actually know how it stands up in the conditions they plan subjecting it to? So would you please elaborate what exactly what was your testing and over how many KMs were the tests conducted and, in what types of operating conditions and environments?
Please correct me if I am wrong but to my knowledge HJS do not make the cat cores at all. Emmitec is the actual manufacturer of cores used by HJS and HJS is but "one" company that purchase cores from Emmitec. HJS then apply a wash coat of their own spec, box the cores up, then market the cores under their own label. Correct?
A wash coat can vary quite significantly depending upon the type and amount of precious metals used. This is also where a lot of the cost is and, what goes toward making the core compliant to EU 4, 5 or 6 (hence the term precious metals you could say). Can you or anyone at FS honestly say that the wash coat that HJS provide you is to a standard that allows compliance to any emission laws relative to the car you are selling it for?
I do know that OEMs and certain AM's apply varying specs of wash coats in a bid to provide compliance for the car they are using the cat on and, that the cost of doing so can be higher according to the volume and type of precious metals used.
With regard to your claim that the insulation of the cat is "superfluous", from my own investigations on the subject matter, the insulation is there for a few specific reasons, one being to preserve the life of the core/substrate against thermal shock. Thermal shock refers to when a heated cat (at operating temperature) becomes subject to an operating environment which rapidly alters the temperature of the core, causing fracturing of the core substrate due to rapid contraction/expansion (i.e when coming into contact with rain, snow, ice etc). Note there is reams of reference material regarding this problem even on the internet so for Fabspeed to dismiss thermal shock and the insulation used to protect the core against it as being superfluous is quite ridiculous. You truly need to back up your claim! It is a bold one!
I recall on Emmitec's own site they even reference the term thermal shock therefore, I would suggest that you provide RL members with a quote or reference material from Emmitec to support your claim that thermal shock has absolutely nothing to do with premature cat failure....or any failures users have had with your own cats for that matter.
Even a layperson would know that the cost of applying certain grades of wash coatings, the skill, and the cost of providing the insulation on the cat costs money and, will therefore be significantly higher than a cat with a one spec suits all type wash coating and, a cat without any insulation whatsoever.
I imagine for many users it ultimately comes down to: will the FS HJS cat last the same life as the OEM and, will the FS HJS cat comply or even come close to complying to "any" emissions laws? Because if it doesn't comply with any of them then it is basically just a decoration on your system, an obligatory measure to show the customer that you have a cat in the system...a feel good if you will. Frankly if your cat does not comply, and/or, is likely to deteriorate under the rigors of thermal shock, then perhaps the user should seriously consider saving their money and buy your catless system....just put on a cat bi pass pipe and be done with it.
PS. You mention other exotic brands using HJS cats. What proof do you have that their OE cats use no heat shielding? You also mention that your cats never fail, or have never failed due to thermal shock? Where is the actual proof of that?
You speak of FS's engineering and development in conjunction with HJS but what did that actually entail? Did FS conduct any emission compliance testing using the cats you are selling on the specific cars you are selling the systems for? And if so what were the results? Did you conduct any premature cat failure scenarios at all? This is what manufacturers usually conduct when they are designing and developing a product so that way they actually know how it stands up in the conditions they plan subjecting it to? So would you please elaborate what exactly what was your testing and over how many KMs were the tests conducted and, in what types of operating conditions and environments?
Please correct me if I am wrong but to my knowledge HJS do not make the cat cores at all. Emmitec is the actual manufacturer of cores used by HJS and HJS is but "one" company that purchase cores from Emmitec. HJS then apply a wash coat of their own spec, box the cores up, then market the cores under their own label. Correct?
A wash coat can vary quite significantly depending upon the type and amount of precious metals used. This is also where a lot of the cost is and, what goes toward making the core compliant to EU 4, 5 or 6 (hence the term precious metals you could say). Can you or anyone at FS honestly say that the wash coat that HJS provide you is to a standard that allows compliance to any emission laws relative to the car you are selling it for?
I do know that OEMs and certain AM's apply varying specs of wash coats in a bid to provide compliance for the car they are using the cat on and, that the cost of doing so can be higher according to the volume and type of precious metals used.
With regard to your claim that the insulation of the cat is "superfluous", from my own investigations on the subject matter, the insulation is there for a few specific reasons, one being to preserve the life of the core/substrate against thermal shock. Thermal shock refers to when a heated cat (at operating temperature) becomes subject to an operating environment which rapidly alters the temperature of the core, causing fracturing of the core substrate due to rapid contraction/expansion (i.e when coming into contact with rain, snow, ice etc). Note there is reams of reference material regarding this problem even on the internet so for Fabspeed to dismiss thermal shock and the insulation used to protect the core against it as being superfluous is quite ridiculous. You truly need to back up your claim! It is a bold one!
I recall on Emmitec's own site they even reference the term thermal shock therefore, I would suggest that you provide RL members with a quote or reference material from Emmitec to support your claim that thermal shock has absolutely nothing to do with premature cat failure....or any failures users have had with your own cats for that matter.
Even a layperson would know that the cost of applying certain grades of wash coatings, the skill, and the cost of providing the insulation on the cat costs money and, will therefore be significantly higher than a cat with a one spec suits all type wash coating and, a cat without any insulation whatsoever.
I imagine for many users it ultimately comes down to: will the FS HJS cat last the same life as the OEM and, will the FS HJS cat comply or even come close to complying to "any" emissions laws? Because if it doesn't comply with any of them then it is basically just a decoration on your system, an obligatory measure to show the customer that you have a cat in the system...a feel good if you will. Frankly if your cat does not comply, and/or, is likely to deteriorate under the rigors of thermal shock, then perhaps the user should seriously consider saving their money and buy your catless system....just put on a cat bi pass pipe and be done with it.
PS. You mention other exotic brands using HJS cats. What proof do you have that their OE cats use no heat shielding? You also mention that your cats never fail, or have never failed due to thermal shock? Where is the actual proof of that?
We have no intention of derailing RCorsa’s thread any further than it already has been. He posted asking about modifications for his 991TT. We provided clear and concise information on a product that we offer for his car, which has been extremely well-received by other 991TT owners. We have already stated that we source and use HJS catalysts in our systems; we do not manufacture the catalysts. We work closely with the engineers at HJS to develop and determine the best catalyst for each system that we design and manufacture. We trust their qualifications, engineering, testing, and expertise, and have had phenomenal results from all of their catalysts for as long as we’ve been using them. All of your specific questions about wash coats and emissions-compliancy will need to be directed to HJS Germany directly, as they are the only ones qualified to speak to those specifications.
What we can tell you is that our exhaust systems that utilize these HJS catalysts are currently being used (very successfully) by our customers year-round in 49 of 50 US states (California not included) without issue, as well as countries throughout North America, Europe, Asia, Australia, the Middle East, and more. We use HJS catalysts specifically because they are the most reliable and most respected high performance catalysts available on the market. Their construction, durability, performance, and longevity are all second-to-none and in many cases outperform and outlast many OEM catalysts. I am not sure what you’re trying to prove, but we have a very long track record of very satisfied customers and we stand behind the products that we develop and sell. If you have any further questions, we encourage you to email us at info@fabspeed.com so that this thread can remain on topic.
12-12-2014, 11:57 AM
New 2015 TTS on its way
Love that picture.
