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Anyone heard anything on the possibility of RPI making an exhaust for the M coupe/roadster? Saw a vid of a supposed prototype on a white M coupe on youtube... called Race Precision Exhaust GT race...
 

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ahh... thank you! I appreciate the link! Now, if only they would offer it for sale....
Dude your in so cal get ur ass over to RPI now and get it fitted!
The reason it hasn't been released yet is because no one with a stock M is in the so cal area and they wont release the exhaust until they can dyno test it on another car.

Give them a call and they will give u free dyno time and install and probably a deal on the exhaust. Exhaust price is supposed to be $550 anyway.
 

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Sorry for the delays guys but we finally completed our dyno testing for the GT exhaust. Retail will be set under $800. Dyno testing today showed an 8whp gain and 5wtq. More info to come. The exhaust will be put into production shortly and we should have them ready to ship in a month or two.
 

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Calvinball Professional
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Sorry for the delays guys but we finally completed our dyno testing for the GT exhaust. Retail will be set under $800. Dyno testing today showed an 8whp gain and 5wtq. More info to come. The exhaust will be put into production shortly and we should have them ready to ship in a month or two.
The ZPost link is full of bitching about BMS and threadjacks. I gave up after a few pages.

Is there any real info about the RPI system anywhere? Specifically: What's the construction - stainless steel? Dual tips? Also, is it a complete bolt on reversible replacement of the full system? No cuts or clamps? Will RPI ship or is this an RPI install only deal?

Under $800 seems to be a very sane price if all the desirable features are there. I look forward to seeing the dyno curve to see exactly where power is made - and hopefully none is lost anywhere along the curve.
 

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The ZPost link is full of bitching about BMS and threadjacks. I gave up after a few pages.

Is there any real info about the RPI system anywhere? Specifically: What's the construction - stainless steel? Dual tips? Also, is it a complete bolt on reversible replacement of the full system? No cuts or clamps? Will RPI ship or is this an RPI install only deal?

Under $800 seems to be a very sane price if all the desirable features are there. I look forward to seeing the dyno curve to see exactly where power is made - and hopefully none is lost anywhere along the curve.
ALL our exhaust systems are made of T-304 stainless steel. This system will have a single resonator on both sides (driver and passenger) and will bolt on to the stock flange with no modification at all. We have made a 2 bolt flange which will be the same as the stock muffler flange. All our systems are made here and we offer a limited lifetime warranty. We DONT use off the shelf mufflers like many other companies. Everything is made from scratch. The system will retail for $799. As for the full system, we are thinking about it but it will depend on how well the axle backs sell. The system will have quad tips. To cut down on production cost, we are sharing the production with our Porsche 996 turbo exhaust. The tips will be taken straight from that system. This helps us keep production costs down without sacraficing quality. Here is a close up of the tips on our 996 system.

 

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Calvinball Professional
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ALL our exhaust systems are made of T-304 stainless steel. This system will have a single resonator on both sides (driver and passenger) and will bolt on to the stock flange with no modification at all. We have made a 2 bolt flange which will be the same as the stock muffler flange. All our systems are made here and we offer a limited lifetime warranty. We DONT use off the shelf mufflers like many other companies. Everything is made from scratch. The system will retail for $799. As for the full system, we are thinking about it but it will depend on how well the axle backs sell. The system will have quad tips. To cut down on production cost, we are sharing the production with our Porsche 996 turbo exhaust. The tips will be taken straight from that system. This helps us keep production costs down without sacraficing quality. Here is a close up of the tips on our 996 system.
Thanks for the info. Are the videos floating around of the white and blue Coupes with or without the resonator? If they are without, what sound qualities do you expect from the resonator? A change in exhaust note (hopefully to a bit lower tone) or just a reduction in the overall loudness of the exhaust?

Any issues with centering the tips to avoid melting the rear apron? The tips on the blue car from the other post seem to not be centered:



Otherwise $799 looks to be a reasonable price point while still maintaining build quality.
 
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