nc_beagle Posted October 18 Report Share Posted October 18 I tried to post this in the proper section but it won't let me. I'd like a little quieter exhaust than what came on my car, which appears to be a 3" Magnaflow. What are some good options that are currently available? A friend said not to go bigger than 2.5" to get sufficient backpressure. Is that correct for these cars? Thanks, Mark Quote Link to comment Share on other sites More sharing options...
tux Posted October 19 Report Share Posted October 19 3" is fine but I don't have quiet options. Quote Link to comment Share on other sites More sharing options...
1SICDSM Posted October 19 Report Share Posted October 19 the hks exhaust is very quiet 2 Quote Link to comment Share on other sites More sharing options...
kev Posted October 19 Report Share Posted October 19 Turbo cars have all the back pressure they will ever need and then some between the head exit and turbine input. For maximum power, the shortest fattest exhaust is needed. So 3” is fine. The benefit of 2.5” is simply for geometry reasons and cost. neither size will do anything about noise level though. That’s in your muffler. You can add a silencer where the cat was, if your cat has been removed. I use a vibrant silencer and it works well. On turbo cars, you want straight through mufflers that don’t impede the flow and create back pressure. These result in being louder. in all, get the biggest straight flow muffler you can and add a high flow silencer/resonator. Also, extending the exhaust tip past the rear bumper greatly reduces drone. 1 Quote Link to comment Share on other sites More sharing options...
nc_beagle Posted October 28 Author Report Share Posted October 28 On 10/19/2024 at 9:16 AM, kev said: Turbo cars have all the back pressure they will ever need and then some between the head exit and turbine input. For maximum power, the shortest fattest exhaust is needed. So 3” is fine. The benefit of 2.5” is simply for geometry reasons and cost. neither size will do anything about noise level though. That’s in your muffler. You can add a silencer where the cat was, if your cat has been removed. I use a vibrant silencer and it works well. On turbo cars, you want straight through mufflers that don’t impede the flow and create back pressure. These result in being louder. in all, get the biggest straight flow muffler you can and add a high flow silencer/resonator. Also, extending the exhaust tip past the rear bumper greatly reduces drone. Thanks Kev, and everyone. I'll look into all your suggestions! Quote Link to comment Share on other sites More sharing options...
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