Quote:
Originally Posted by redlightningsvx
For about a stock engine, Most people I see use a 2.5in from the manifolds to cat and 2in back from the cat to muffler. But if the muffler and resonator you have are 2.5in the i would just get a coupler on the cat.
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2" dual from the manifolds to the main cat
2.5" single from the main cat to resonator and transverse muffler
Tom