General engine questions/issues that aren't specific to the other categories
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By EJ1-danny
#199353 hey i have apexi WS2 for my 94 SI hatch im looking to get a test pipe for it but i dont know what size i need 2.25 or 2.5 ??? :? :?
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By blk92hb
#199584 i wouldnt get anything bigger than 2.25 imo, the ws2 has 2.35 inch pipe or 60 mm pipe but its the same.