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Cobb EVO SS 3" Cat Back Exhaust
SKU: 551100
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Overview
Technical Specs:
- Full 3" system
- 304 Stainless Steel
- 8lbs lighter then stock Cat Back
- Eliminates the use of one exhaust hanger
Click image to enlarge an installed view of the exhaust tip.
Click image to enlarge an installed view of the exhaust tip.
Click image to enlarge an installed view of the exhaust tip.
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.









