Blownfish said

I may not be much help since I have a small block but mine fit nice, they don't come with a collector so you need to weld one on. I used a set of the ball flange type collectors from Flowmaster and then sent them off to Jet Hot for coating. They are pricey and with the mods I done I have a little over $1000 in them with the crank vents, collectors and coating so be prepared to open your wallet.

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