Originally Posted by cobie56
Question for you all:
someone on this forum mentioned before that altering the back pressure will affect the engine performance/fuel mileage.
Can someone clarify this? will using an aftermarket muffler or an OEM muffler from another brand negatively affect the car's performance? thnx
A cat-back exhaust will not affect the cars fuel economy, if anything it'll improve it. A less restrictive (ie louder) exhaust will give a small boost in power, and the engine will have to work less to match the stock performance... unless the new exhaust makes the driver use the skinny pedal more because they enjoy the aural qualities of their modification.
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