Looking for exhaust opinions
May 10, 2011, 10:43 AM
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Looking for exhaust opinions
Hey all,
I am considering getting a new exhaust for my Evo 8 and I am curious to know what is the quietest high performance exhaust around. I am also looking to put a high flow cat on the car and would love if I could find an existing setup that meets both requirements.
Thanks,
Josh
I am considering getting a new exhaust for my Evo 8 and I am curious to know what is the quietest high performance exhaust around. I am also looking to put a high flow cat on the car and would love if I could find an existing setup that meets both requirements.
Thanks,
Josh
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May 10, 2011, 12:03 PM
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My Bursher racing isn't too bad...Idle is pretty quite and doesn't start to scream until you're in it hard. Oh and my after market high flow cat didn't help me pass emissions..just FYI. Had to put stock tbe on the car to pass emissions.
May 10, 2011, 03:15 PM
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Cobb has a pretty quite setup for their downpipes and exhaust if you can find one. Look at the info from their website;
Below are some sound measurements we took within the SAE guidelines.
Stock Exhaust
idle - 74dB
SAE - 81dB
Stock DP & Cat with COBB Cat Back
idle - 80dB
SAE - 88dB
COBB DP, Stock Cat, COBB Cat Back
idle - 79dB
SAE - 93dB
COBB DP, COBB Catless Test Pipe, COBB Cat Back
idle - 83dB
SAE - 98dB
COBB DP, COBB high flow Catted Test Pipe, COBB Cat back
idle 80dB
SAE 94dB
You might be thinking "What do SAE Guidelines have to do with me?"...
Well, if you drive on public roads, they have everything to do with you and your car. California regulations contain a number of sections specifying permissible vehicle noise levels. The bulletin advises that passenger car exhaust systems that comply with the requirements are deemed to comply with Vehicle Code enforcement, governing mufflers and exhaust system modifications. The exhaust noise provisions establish a limit of 95 dB measured 20 inches from the exhaust pipe outlet with the engine operating in neutral, at a specified speed typically between 3000 and 5000 rpm. Exhaust system modifications are permitted to increase noise above the level of original factory installed systems as long as the 95-decibel limit is not exceeded.
Below are some sound measurements we took within the SAE guidelines.
Stock Exhaust
idle - 74dB
SAE - 81dB
Stock DP & Cat with COBB Cat Back
idle - 80dB
SAE - 88dB
COBB DP, Stock Cat, COBB Cat Back
idle - 79dB
SAE - 93dB
COBB DP, COBB Catless Test Pipe, COBB Cat Back
idle - 83dB
SAE - 98dB
COBB DP, COBB high flow Catted Test Pipe, COBB Cat back
idle 80dB
SAE 94dB
You might be thinking "What do SAE Guidelines have to do with me?"...
Well, if you drive on public roads, they have everything to do with you and your car. California regulations contain a number of sections specifying permissible vehicle noise levels. The bulletin advises that passenger car exhaust systems that comply with the requirements are deemed to comply with Vehicle Code enforcement, governing mufflers and exhaust system modifications. The exhaust noise provisions establish a limit of 95 dB measured 20 inches from the exhaust pipe outlet with the engine operating in neutral, at a specified speed typically between 3000 and 5000 rpm. Exhaust system modifications are permitted to increase noise above the level of original factory installed systems as long as the 95-decibel limit is not exceeded.
May 10, 2011, 06:21 PM
#15
I also have the hks carbon with a 3 inch down and test pipe. I agree this is a relatively quiet set up under normal driving while inside the car... my car can be heard a block away though even while taking it easy