I'm thinking of removing and bypassing the center muffler. I have looked online and Sharkwerks and GMG both seem to a nice product and my local track prep/mechanic here says he has made several himself for other customers. First does anyone recommend anyone else? And second as far as the bypass, it all seems rather basic so I'm wondering if there is really any difference between any of them beside name brand. Thanks.

 

Sharkwerks, GMG, & RSS
I prefer sharkwerks because you can add larger size or material ie..Ti Tips, they can be ordered steel or ceramic coated and Alex is fantastic to deal with.

They are all pretty much the same in performance which BTW is practically none, but they all do save some weight and they all make your car sound like it is supposed to sound. Bad@$$

 

Actually there is a big difference in the engineering and design of our World Challenge System versus the other systems on the market.

Unlike other systems on the market which divorce the left and right banks our center section utilizes a expansion chamber which equalizes the exhaust pulses as the engine fires. This offers the proper amount of back pressure between left and right cylinder banks. ( Like the factory muffler)

Exhaust velocity and sound are further enhanced and with the megaphone design in the primary pipe as it exits the main mufflers.

Our system utilizes dual 3.5" tips which are part of the system itself.

Our system is also the same system that is used on our World Challenge GT cars.. Race Proven...


Hand built in Ca, T304 U.S. made stainless steel.



http://gmgracing.com/porsche_exhaust...c9972gt3.shtml










http://www.youtube.com/watch?v=bYXdybvDuuo

Feel free to drop me a note if you have any questions.

 

In all seriousness, after the exhaust gasses have passed through the headers..... catalytic converters..... and mufflers ......and are ~7" from the exhaust open tips, there's any REAL measurable back-pressure gains made by connecting the two pipes at this late stage?

However that said, it is a nice looking piece!!

 

Its not so much as there is a gain as you need to maintain the back pressure so the car does not loose power.
Hence the reason for the balance chamber which simulates the stock muffler.
Exhaust scavenge is also maintained in the balance chamber as well.

 

X-Pipe Design and Engineering Philosophy,

For any performance exhaust system, some type of crossover connecting the two sides of a dual exhaust system is important because it acts to balance the two banks of the engine. The common H-style crossover is good at balancing sound pulses between the two halves, but does little to promote scavenging because the exhaust gases tend to follow the path of least resistance, which is straight through each pipe rather than taking the 90-degree turn through the H-pipe into the other half of the system.

In an X-pipe system, however, where the two sides of the system intersect, the gasses have no choice but to intermingle as they pass through the junction. This promotes improved scavenging effects by smoothing out uneven exhaust pulses from the engines firing order. It also helps quiet down the exhaust, resulting in a mellower, less raspy tone. According to the theory, the faster acceleration of the gasses through an X-pipe causes them to flow in a linear fashion parallel to the walls of the tubing rather than tumbling. This “laminar flowing gas” is much quieter than tumbling gas, resulting in better scavenging and a unique exhaust tone that traditional H-pipe style cross over or individual non crossover exhausts do not offer.

RSS wanted an all in one solution for the GT3/RS that addressed sound, weight reduction (the X-pipe weighs only 8 lbs.), offered aggressive larger tips, and had a strong one piece stainless steel design. We also wanted to make it available in satin black ceramic coat to suit our style. With the RSS X-Pipe bypass design, we feel it addressed all our base criteria. Most importantly our customers have validated our design goals based on their overwhelmingly positive feedback in regard to the overall construction quality, unique sound, and strong visual appeal of the X-Pipe.

-mike


http://www.youtube.com/watch?v=eHXIu0p8pBk

http://www.youtube.com/watch?v=3Btdi...eature=related

 

+1
Mr. B

 

I would highly recommend the GMG system. Its well engineered, the fabrication and construction is top notch as the welds are phenomenal, and it sounds unbelievable on my 07 GT3RS.