I am looking for a new exhaust bypass / rear end for my 997 GT3. I have seen both the GMG and Sharkwerks setups highly recommended on this forum by many members. They both look great and sound great from the small video clips I have managed to find.

Can someone tell me any major differances between these two?

Are these the best two out there or are there other recommendations?

 

FabSpeed makes a rear center section also. Looks nice but is more expensive.
It actually is 2 small cans on each side. I do not know about sound. I've seen no videos.
The Sharkwerks and GMG are the most popular.

Good luck

Ranger

 

I have GMG. I don't think there are major differences. Both sound awesome, just a bit different. Can't go wrong with either.

 

Here is a link to our system - pictures- sound clips etc.


http://www.gmgracing.com/porsche_exh...wc997gt3.shtml


We also have GIAC software tuned for the center section.. Which is a very nice option.

997 GT3 997 GT3 RS
GMG introduces its WC (World Challenge) Sport Center Section for 2007+ 997GT3 and 997GT3 RS owners.

Designed and tested on GMG's 997GT3 this system is a direct bolt on replacement center section which reduces weight, improves sound and offers a mild increase in performance. Porsche has done a wonderful job with the design and manufacture of the factory system with virtually no improvement to be made by installing a complete (mufflers, headers and cats) aftermarket system. GMG's WC Sport Center Section is 100% emissions legal, will not void factory warranty and is a direct bolt on replacement center section with dual 3.5 stainless tips (factory offers dual 3"). The system is made of mandrel bent T304 stainless tubing which is TIG welded and features a proprietary megaphone design to improve sound in the upper RPM range. The GMG WC system saves over 20 lbs of weight over the stock, power is up 3-5 hp on average and now the sound is finally worthy of this magnificent engine. GMG was the first company to pioneer this sport center section design. Also available as a power kit with GIAC custom tuned software for an increase of up to (real world) 15hp and 20lb ft of torque. (fuel dependant) Inquire for special Power Kit pricing. ECU must be sent into GMG for flashing,. ECU's will be sent back same day via Fed Ex minimizing down time.

Key features of the GMG WC Sport Center Section:
- 100% emissions legal, will not void warranty - Direct bolt on replacement, no removal of bumper required
- T304 stainless tubing all stainless aerospace grade hardware and clamps
- Proprietary megaphone design- mandrel bent tubing
- Tig welded and normalized for strength
- Saves 14 lbs over the stock center section
- Sport button remains fully functional for every day use, absolutely NO modifications necessary
- Offers a deep aggressive exhaust note over the stock system. Hit the Sport button and listen to the beautiful engine noise that the GT3 engine produces
- Factory primary mufflers, catalyst and exhaust flaps are all retained


Available in standard "raw"stainless, black thermal coat or fully polished.



* wholesale inquiries welcome
** world wide shipping available
*** installation available