Why 3 inch exhaust if headers are 2.5 inch?
11-25-2017
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Re: Why 3 inch exhaust if headers are 2.5 inch?
Depends on your build. Stock? Dont bother. Boost or built af n/a? Then yeah, maybe
11-26-2017
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11-26-2017
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Re: Why 3 inch exhaust if headers are 2.5 inch?
Water flow dynamics would be a comparable study.
If you run a turbo you're not really running a regular header per se, the turbo is the exhaust restriction.....and you want exhaust to flow as freely as possible after the turbo. Any restriction after the turbo can reduce efficiency and boost. Bigger is better in this case.
