Soul Performance

I'm available all day, give me a text/call any time : )

Welcome to the party : ) I'll shoot you a PM to discuss it a little further, I can't give away all our plans yet publicly haha.

bli8

OP why did you choose the side muffler delete vs the center section delete?

John@Fabspeed

Phil from Fabspeed here.
There are many benefits when you switch the side mufflers over the center muffler.
1) retaining the center valve control to go from muffled exhaust to straight pipe
2) you can lose more weight by getting rid of the side mufflers over the center (34LBS)
3) you can gain more power by making the exhaust more free flowing.
I hope this helps you as to why someone would choose one over the other.

cbrett

keep me posted john!

bli8

Thank you for the clarification Phil, I'll look in this further as I have 600 miles now on my .2 GT3 and am considering doing a delete, just not sure which one to go with.
So is the side muffler delete louder than the center delete?
Is there a video sound clip of cars with both mods side by side so we can hear the nuances of the 2 systems being recorded in the same environment by the same equipment?

Soul Performance

Will do Brett

It's going to be a bit subjective but I'll give you a short run down. Typically center muffler bypass pipes are louder with valves open and quieter with valves closed versus valved side muffler bypass pipes. This is due to the factory side mufflers having more chambering/sound restriction in the valves closed position and less with the valves open than the factory center muffler. However, some side muffler bypass pipes depending on their construction can have more sound in the valves open position than others based on piping diameter and how far the pipe penetrates into the bottom portion of the center muffler. Sounds clips won't do too much justice for you between the two as their simply aren't even side muffler bypass videos out there yet in various conditions of load/acceleration. However what I can tell you from an exhaust note perspective is that the basic difference in most cases is the side muffler bypass pipes have a smoother, more refined exhaust note and a center muffler bypass has a less refined, more raw/aggressive exhaust note. Valved side muffler bypass pipes also have a lot smoother of a transition between valves closed and open under throttle than a center muffler bypass, which a lot of people like over the center muffler bypass. I'll shoot you a PM too, there are some more subtle differences in exhaust note between different types of side muffler and center muffler bypass pipes we can discuss in more depth.

Also...congratulations on your new car!

NJRickD

Watching that, my gut tells me the center bypass with the stock sides is louder than this option. Just my opinion from watching this video

edit- I should clarify, I disabled my valves. I absolutely hate the sound of the transition and wanted no parts of it.

Soul Performance

I've heard most every combination at this point and your gut it pretty on point haha. You're a Jersey guy, you have a GT3, are you going to the PCA NJMP event this weekend? If so I'll see you there

NJRickD

unfortunately not.

bli8

Hi Phil,
But the valves will be retained with the center section delete too, right?
And how come the side delete is $100 cheaper on your site than the center delete? The side delete involves two separate units and 2 valves, while the center delete is just one piece, albeit larger. If I were you, I would either charge more on the side delete (just saying but don't do it) or reduce the price on the center delete.

John@Fabspeed

The valves would be retained but not as effective. You would see more performance and bigger sound upgrades with the side muffler bypass and drop more weight.

As far as the pricing with the center muffler bypass you are also receiving tips that you do not receive with the side muffler bypasses. Receiving the tips and more complicated build with the center muffler bypass; I would say they are priced very well.

John@Fabspeed

Congratulations on the new GT3! Seems like everyone has or is getting a GT3 and I love it. It’s such an amazing car. Fabspeed has learned so much about the 997GT3 and 991 GT3 cars based on Fabspeed Motorsports over 12 years of experience with working with 100s upon 100s of these GT3 owners and their cars worldwide.
Fabspeed Motorsport got the USAs 1st 2007 997 GT3 in the late 2006. The car was airfreighted to our facility. At that time 12 years ago our team designed, engineered and dyno developed an entire line of GT3 emissions legal and GT3 Racing Competition systems that are world class durable street and racetrack proven.
There are some many quality exhaust upgrades for the 997GT3 and 991GT3 that immediately give the cars a solid weight savings and smooth superb GT3 CUP like sports car sound that Opens and Closes via the Porsche factory GT3 exhaust valves system.

For a sweet GT3 sports car sound track I would recommend Fabspeed Motorsport designed GT3 side muffler bypass pipes with vacuum valves for superlative valve controlled sports car sound. If you want even more aggressive sports car sound in addition horsepower and torque, then our GT3 sport or race headers would be the perfect option. We have them currently in-stock and have sold to hundreds of customers and shops around the globe, such as AutoQuest Motorsports.

On any and all GT3 cars I would always recommend a set of side muffler bypass pipes even for bone stock cars. Why? Fabspeed Motorsport GT3 side muffler bypass pipes are a logical choice because they are super easy to install on any & all GT3 cars, and it saves a massive 35 pounds (17 KG) off the back of all GT3 cars. It also eliminates so much of the Heat Soak around your GT3 engine while attaining more power torque and sportscar sound all in one!
Fabspeed Motorsport GT3 side muffler bypass pipes are 100% made in house at Fabspeed Motorsport USA, using only the very finest components available bar none.

We have learned designed and engineer so much over our 25 years in the industry. When we first started out we used to buy vacuum valves from China as these were the only exhaust valves available. We discovered that these vacuum valves would break, elastic diaphragms melt/fail, the valves would rattle, action arms snap and the valves would need to be replaced. We knew we needed to permanently overcome and eliminate the valve failure problem and better serve our customers, so we switched over to valves engineered by Helical Technologies UK. After going to Helical headquarters England, Helical England appointed Fabspeed Motorsport USA as their North & South American dealer distributor for exhaust valves that are also exclusively used by Porsche Ag, Ferrari spa, McLaren UK, Lamborghini, Aston Martin and Tier1 OEMs that demand and expect long-term performance and durability.


Low grade cheap valve versus Top level Helical expensive valve On the side view they look very close to the same


To be clear, the exhaust industry has many suppliers who fall short on providing quality components like exhaust valves in their systems, resulting in failures that will occur overtime. Its not if they will fail, but when.

A lot of valves on the market will fail over time. Fabspeed has designed an unbeatable product that will stand the test of time, so why take a risk? With Fabspeed you know you’re getting the best


Here you can see the low grade valves that Fabspeed has moved away from. This is a huge point of failure because heat penetrates the diaphragm creates a loss in vacuum seal and eventual fails.

When you buy a product from Fabspeed Motorsport USA you are getting much more than just the product itself, you are getting peace of mind. You don’t have any worry that there will be bumps in the road or that we will have issues with the first version of the product, since we have passed that stage many years ago. We can guarantee our quality because we use the best materials and components available, we pay a premium to have extremely talented fabricators, and we pay a premium to provide them with the best multimillion-dollar CNC equipment, tools, and working environment they need to create masterpieces for your vehicle.

Here is the Helical valve casting. As you can see the joints are more robust and does not allow the heat penetration.

On any Porsche with exhaust valves and the GT3 when you depress the button to OPEN the valves the VALVES stay open. Each time the driver starts the car the valves go back to be opening and closing based on factory ECU programming based on Porsches mapping. Your GT3 valves open at idle to sound great at Cold Start and then Open & Close based on engine load / throttle position. When you fully accelerate the vehicle, the engine wants to have a wide open, no backpressure exhaust system for maximum flow which is why the exhaust valves open to reduce exhaust restriction.

fastmd

I recently purchased the fabspeed valved bypass and the quality was excellent. Valves work great with OEM center, not as effective with center bypass.

Ducati1199

fastmd