- Mar 19, 2010
As the size of the exhaust system increases does the engine gain or lose power? For example, I have an L34 396 V8, what effects does a 2.5 inch vs 3.0 inch exhaust have on the engine performance/power/etc....
jtwoods4 said:I bought the car with 3 inch exhaust so I am wondering if I will get better performance with 2.5 inch, I am changing the CAM back to almost stock (little bigger) from the massive thumper that is in there now. 396 engine