MaddMike

I went silly with it and got the inconel and the CF tips because F-it.

I almost went SS but in the end, I didn't want to have buyers remorse and wish I had gotten inconel and end up buying it anyway. Buy once, cry once.

I do plan on keeping this car forever but we all now how plans can change and I think inconel will have a higher return should I need to sell. In addition, Surpreme Power was easy to work with and provided much better pricing then the competition so with the tips, it still came out cheaper than just the exhaust from someone else.

ariazad

I went full Inconel back box, OAP’s and headers with the CF tips. Agree with others sentiment of buy once cry once. Coupled with the Softronics tune, it sounds incredible.

TriggerHappy

Thanks all for the feedback. At this time I think I will be okay with the SS. Just too much of a jump from SS to Inconel… and what you don’t know won’t hurt you! Maybe one day I will come across another Spyder/GT4 with a Kline Inconel exhaust and think - “why didn’t I go for the Inconel!” But since I have yet to see another Spyder in the wild here in Ottawa - think that will be slim chance.

question - when replacing OAP and back box - do you guys check with your dealer regarding warranty impact? From what I read I don’t think it will but want to be certain. Also what about Cargraphic valve controller? any warranty issues. This is my first Porsche and first AF exhaust…

TIA!

ttcbj

I don't think there are any guarantees regarding warranty with aftermarket mods.

I've made my peace with the reality that it might be a problem. In terms of rationally assessing the risk you are taking: I think the likelihood of a major failure is low, and the likelihood that Porsche will refuse a warranty claim based on the mod is also low. So, what is the expected cost of the warranty risk? I think pretty low. Probably a lot less than the cost of the muffler, or the cost of annual depreciation on the car. I think what makes it more bothersome is that it is an unknown. I know I'll probably buy a new engine's worth of depreciation before the warranty even expires, but it doesn't bother me because its a known cost.

I don't personally plan to sell the car when the warranty expires, at which point I am going to be assume 100% of the repair risk anyway. Assuming you are in the same boat, your net increase in repair risk/cost is just 2-3 years times the previous two low probabilities. On the other hand, I know someone my age (late 40s) who just got diagnosed with stage 4 cancer and probably has a few months. So, I'm going to maximize my enjoyment of the car, and accept the moderately increased risk of expense.

Bill_76

SS short video - Valves open all the time.

Westcoast

There are tons of posts here on Rennlist about warranty implications, as we are in Canada any comments from our friends south of the border with regards to their laws are not relevant. Also remember warranty is provided by the manufacturer, the dealer is only acting as their agent, in Canada, Porsche Cars Canada would make the determination but working within PAG guide lines.

Will you have problems with warranty coverage, maybe not, especially if the issue is on an unrelated system but if you want absolute assurance that you are not in a grey area and want 100% support for your entire car then do not modify anything. Also if you are considering extending the warranty, the car generally needs to completely stock, or that coverage could be denied. I am sure that you will now hear contrary view points because of what I have said, but I will say that you are on your own heading into modifications and must decide for yourself if you are willing to go this route, definitely talk to your dealer's Service Manager and get it straight from the guy that will have to ask for coverage on your behalf... that way you can make an informed decision.

HTH

MaddMike

Or, you can not modify anything and always service you car at the dealer and still have the dealer deny your warranty claim--at least if you own a BMW.

In the US, a failure would have to be related to the modification. So, if you install an exhaust and your paint starts peeling on the hood, they can't legally deny that claim. If you install an exhaust and you have a cat failure they may say that the decrease in back pressure yada-yada.

Westcoast

That is why I called it a grey area, the original question cannot be answered with 100% certainty, that is why I suggested @TriggerHappy ask for himself at his own dealer before deciding. In this case Rennlist is only a sounding board not a place for a definitive answer.

dmboone25

No idea if this argument would be successful, but here's how I would frame it logically: the closer you get to the engine, the higher the probability that they're going to deny warranty work for some drivetrain related issue.

If you're just changing the back box, or even the OAPs (which aren't monitored in the US), I think there's a fairly decent argument to be had that those components are unlikely to impact the engine or transmission in a negative manner. But if you change the headers, or install a tune that pushes respective thresholds beyond stock limitations, I think it becomes a harder argument to make.

I had an F80 M3, and one of my lifters failed...and the first thing they wanted to talk about was modifications to the ECU. I hadn't made any, but I had unplugged my exhaust valves and zip tied the lines...and so that's where they went from the jump. The dealer ended up covering the repair, but there was a lot of time and focus spent on whether or not I had modified the car, as presumably that would have been a pathway to deny the warranty claim.

As @Westcoast rightfully points out, there isn't a straight answer, other than not to modify. I think a conversation with the dealership's service manager is prudent, and hopefully gains you some rapport due to you being transparent with them, but doesn't necessarily cover you when things go sideways. They might be able to provide some context on how things have worked in the past, and whether (in their respective experience), there's any sort of "magic line" to stay behind. In any event, it's really about how comfortable you are with the assumption of the risk vs. how much you like or dislike the characteristics of the stock exhaust....

TriggerHappy

thanks all - yes understand there are no absolutes and degrees of grey. I am in risk management so - understand the concept of probability, impact and risk tolerance very well. A conversation I frequently have with a good friend and fellow Porsche owner, who, as a retired CFO, risk tolerance is well bellow mine on these sort of things...I think I will reach out to the service manager on this question - not to get their blessing but to understand the risks associated and what potential issues I may have with respect to warranty. The warranty as a CPO goes until 2026 so - it is substantial....

Soul Performance

From years in this industry, my experience leans to anything after the cats (my experience extending to say "monitored cats") will not impact warranty since it will not effect the vehicles ability to meet emissions, cause it to run outside of the OEM adaptations, etc. It's an interpretation of the Magnusson-Moss Warranty act. "The Magnuson-Moss Warranty Act prohibits product manufacturers from conditioning consumer warranties on the use of any original equipment part or service."

We have Porsche dealers that will sell and install our systems on brand new cars. If you are flashing the ECU, well, that's a much different scenario than bolting on an axle-back system. Feel free to DM with any questions!

Dave @ SOUL

SupremePower

We have never had any issues w our local USA dealers. May be a good idea to check w your service advisor in Canada for peace of mind. Let us know what you find! Always interested to hear about these subjects in various places!

SupremePower

Can do you a solid deal if you want to get the Inconel or Stainless and add the tips. Plz feel free to shoot us a msg at sales@supremepower.com

We also have a few sets of the Porsche GT4RS tips incoming too.

josephr25

You really should just get the inconel version for a more exotic sound.

My own experience, my dealership hasn't said anything about my car being straight piped from the cats onward... probably helps they used to race in the ALMS days haah

dmboone25

Thanks for that feedback Dave - on the 718 Spyder / GT4, are the OAPs considered secondary cats? Or perhaps in some places, but not in the US?