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I removed mine, and it really lets the engine breath better...
Just expect to run out of fuel faster... I want to lean it a little bit, but I dont wanna put my engine at risk of detonations while testing...


no cat.+ aftermarket muffler Sounds al most the same as the setup cat+ aftermarket muffler...

Believe me the cat is the biggest restriction in the exhaust system...

Fortunatetly I my car is not US based so I dont have any CEL problems...
 
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