Great if you're making big power, but they are truly a waste if you're on a budget. Truck manifolds are good to well over 1000wh, I believe the record is close to 1500. I'd say save your money for your fuel system or electronics - somewhere that the money spent will make a difference unless you're in the 1300+hp range.It's a rough life. Between the back pressure and the heat. Even a good header will not be happy. I'm going with the Hooker cast iron turbo manifolds.
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