Quote:
Originally Posted by Blu3Z3rg
Pipe Sizing Calculator
Use this for a VERY accurate calculation of your diameter size.
You don't need HP for fuel efficiency. You DO want a properly sized exhaust, with a SMOOTH flow in your exhaust.
Mandrel bends, straight flow mufflers, high-flow cats. THAT's what will give you the benefit.
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This calculator is really complicated. I'm new to EcoModding. I just got a VX that has a 3" aftermarket intake. The exhuast pipe was replace from the engine back and has a 2007 Si muffler. I guess tomorrow I'll take some diameter measurments n figure out what else I need.
