Getting the car on the road

NoDOHC · 09-16-2010, 04:36 PM

I have never heard a Borla in person, but I have heard good things about them.

I ran gutted stock cats, Stock Y pipe and Dynaflow straight-through mufflers with my stock ported 6-port with no problems with sound. Updating to Racing Beat headers and a straight pipe did not make the sound level intolerable on the 6-port (exhaust port diffusers).

Then I went 4-port (no diffusers)... WOW! I couldn't drive the car. After one test drive, I left it in the driveway until I found another exhaust solution. The Racing Beat presilencer made the car tame while cruising, but it still sings pretty loud when under WOT.

The best exhaust repair idea I had was buying a used Racing Beat exhaust (Complete from manifold) for $350.00. No more issues with sound (although this was on my '91 which was quieter with no exhaust after the manifold than the 4-port was with a full exhaust system minus the presilencer).

Basically, if you don't have access to a welder, Corksport may be Ok because you have diffusers in your exhaust ports. Otherwise, you could try finding some decent Piston engine mufflers and welding them to your factory Y pipe.

My thought with buying racing beat is this: If I will be spending money on something else and saving to buy the RacingBeat exhaust, I should just wait until I can afford the racing beat exhaust.

Watch Craigslist and eBay, sometimes you get a deal.

09-16-2010, 04:36 PM	#33
NoDOHC The quest for more torque Join Date: Sep 2008 Location: Sheboygan, Wisconsin Posts: 855 Rep Power: 18	I have never heard a Borla in person, but I have heard good things about them. I ran gutted stock cats, Stock Y pipe and Dynaflow straight-through mufflers with my stock ported 6-port with no problems with sound. Updating to Racing Beat headers and a straight pipe did not make the sound level intolerable on the 6-port (exhaust port diffusers). Then I went 4-port (no diffusers)... WOW! I couldn't drive the car. After one test drive, I left it in the driveway until I found another exhaust solution. The Racing Beat presilencer made the car tame while cruising, but it still sings pretty loud when under WOT. The best exhaust repair idea I had was buying a used Racing Beat exhaust (Complete from manifold) for $350.00. No more issues with sound (although this was on my '91 which was quieter with no exhaust after the manifold than the 4-port was with a full exhaust system minus the presilencer). Basically, if you don't have access to a welder, Corksport may be Ok because you have diffusers in your exhaust ports. Otherwise, you could try finding some decent Piston engine mufflers and welding them to your factory Y pipe. My thought with buying racing beat is this: If I will be spending money on something else and saving to buy the RacingBeat exhaust, I should just wait until I can afford the racing beat exhaust. Watch Craigslist and eBay, sometimes you get a deal. __________________ 1986 GXL ('87 4-port NA - Haltech E8, LS2 Coils. Defined Autoworks Headers, Dual 2.5" Exhaust (Dual Superflow, dBX mufflers) 1991 Coupe (KYB AGX Shocks, Eibach lowering springs, RB exhaust, Stock and Automatic)