ford 460 exhaust

Yankee Clipper has it right. I replaced my manifolds on my 96 460 rig with a Banks and did it myself. Worth every penny. The Banks stainless flange is almost 5/8 thick and will not warp. It's not an easy job, but only needs to be done once. If you want to save some money skip the ram air part. I did some testing and all the gains we're from the headers, so I went back to the stock air filter. Be aware the headers are more noise, like a muscle car. Don't buy new manifolds from Ford, or have the old ones milled, you just waste the money cause they warp again. I hope you have good luck and none of the bolts break. If the back right one breaks clean at the head, and you need to drill it out, they sell special kits that keep the bit straight. Plus make sure you don't drill too deep. If I recall there is only 3/8 of metal before your into the water jacket.