Exhaust question
#1
Rennlist Member
Thread Starter
Exhaust question
How much of the 997 gt3 exhaust bolts up to our cars? What parts would i need?
Is it possible to swap the header and muffler and run a pair of crossover pipes to the exits on the bumper cover?
Karl
Is it possible to swap the header and muffler and run a pair of crossover pipes to the exits on the bumper cover?
Karl
#4
Rennlist Member
Thread Starter
I understand that if I run the whole of the 997 exhaust I need to swap out the bumper for the Cup bumper. My scheme at the moment is to run the 997 header, and the 997 muffler only and have a custom runner run from the passenger side muffler to the drivers side cut out on the 996 gt3 bumper , and likewise from the passenger side to the drivers side.
I am curious to know what parts I need to this, i.e., do I need the 997 brackets and exhaust hangers? Do any parts need to be fabricated to run the 997 header/cat and muffler, or does it all just bolt right up?
At this point I am just in the planning phase and looking to determine the plausibility of the idea.
I am curious to know what parts I need to this, i.e., do I need the 997 brackets and exhaust hangers? Do any parts need to be fabricated to run the 997 header/cat and muffler, or does it all just bolt right up?
At this point I am just in the planning phase and looking to determine the plausibility of the idea.
#6
Race Car
I understand that if I run the whole of the 997 exhaust I need to swap out the bumper for the Cup bumper. My scheme at the moment is to run the 997 header, and the 997 muffler only and have a custom runner run from the passenger side muffler to the drivers side cut out on the 996 gt3 bumper , and likewise from the passenger side to the drivers side.
I am curious to know what parts I need to this, i.e., do I need the 997 brackets and exhaust hangers? Do any parts need to be fabricated to run the 997 header/cat and muffler, or does it all just bolt right up?
At this point I am just in the planning phase and looking to determine the plausibility of the idea.
I am curious to know what parts I need to this, i.e., do I need the 997 brackets and exhaust hangers? Do any parts need to be fabricated to run the 997 header/cat and muffler, or does it all just bolt right up?
At this point I am just in the planning phase and looking to determine the plausibility of the idea.
IDK what you expect to gain from this the side mufflers are the first thing to go in all of these systems and the major restriction and huge heat sink. 997 GT3 exhaust on a 996 GT3 is one of the few exhausts that works and makes some power on these cars, but everyone that runs it runs the headers and side muffler bypass pipes with the center muffler only.
The setup I believe you're proposing won't even sound like a 997 which is the other draw to going to the 997 system.
#7
Rennlist Member
Thread Starter
Thanks for tuning me on how others use the 997gt3 exhaust. I searched and search and found nothing.
I was planning on the side muffs and exiting on the stock 996gt3 exits. My thoughts were based on the Sharkwerks center muffler delete.
I get the heat sink issue though.
Is there enough room for the center muffler with the cup bumper? Does it bolt up, or do I have to fabricate anything?
I was planning on the side muffs and exiting on the stock 996gt3 exits. My thoughts were based on the Sharkwerks center muffler delete.
I get the heat sink issue though.
Is there enough room for the center muffler with the cup bumper? Does it bolt up, or do I have to fabricate anything?
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#8
Race Car
I had 2011 RS exhaust on my 2004 GT3 which, along with CF cup bumper, saved over 70 lbs off the back of my GT3. The 997 headers and cats are compact, single-piece units with equal length tubing which is much improved. You'll want new header gaskets and header bolts when making this swap, obviously. The O2 sensors need to be customized to reach your engine harness because the 996 exhaust crosses over and clips into the opposite side for rear sensors while the 997 system doesn't. If using the 996 Cup rear bumper then you'll need to get creative with the aluminum rear bumper beam and remove the rivets from the bumperettes to clear [which is what I did] or remove the bumper beam completely which I think is a bad idea. You'll also want the Cup car heat shielding for this bumper.
For mufflers, the above posts are correct. I had Ti center muffler only with FVD single tube bypass pipes which comes with secondary inlet blockoff plates. If you go with the 997 RS muffler then you also need the muffler straps and a correct 997 muffler bracket because the 996 bracket won't work. Goes without saying that the cat pipe to side muffler clamps and center muffler side flanges are also needed.
I was going to test an idea which allows keeping the stock 996 GT3 rear bumper and side exits but leverages the 997 GT3 headers + cats. If you're interested then email me through Rennlist.
For mufflers, the above posts are correct. I had Ti center muffler only with FVD single tube bypass pipes which comes with secondary inlet blockoff plates. If you go with the 997 RS muffler then you also need the muffler straps and a correct 997 muffler bracket because the 996 bracket won't work. Goes without saying that the cat pipe to side muffler clamps and center muffler side flanges are also needed.
I was going to test an idea which allows keeping the stock 996 GT3 rear bumper and side exits but leverages the 997 GT3 headers + cats. If you're interested then email me through Rennlist.