91 Civic Si B16A swap

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danse

Junior Member
Hi everyone,
I have a 91 Civic Si and I am swapping in a JDM B16A to replace the D16A6. If I don't want to use the stock manafold, what header will fit the engine and work in a 4th gen? Thanks...
 
any B series header should fit, best bet is to find a header that you want, bolt it up, take it to a muffler shop to get either the header or the exhaust shortened/extended to fit.
 
They're all right! When you shop for a header you must get one that corresponds with your engine, swapped or not. When searching for a cat back exhaust, you'll want an exhaust that fits your chasis.
 
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