Originally Posted by silver

Nice kill Marty. Let me tell you something. I bought some stock manifolds on ebay so I could port them without ruining my own JIC. If you have not looked at the flow of a stock manifold it will surprise you. Very uneven and "ledgey" at the collector. It has tremendous room for improvement. THanks kevin for the do it yourself header mod. If you guys have not done this you SHOULD. I have not put on the new ones yet but the are WAY more smooth and should spool like hell now. It also was not too hard to do. I bought a $20 air grinder and a $20 tungsten carbide bit both from Acwe hardware. It took me about 4 hours to do them both but I am **** as hell. I could probably now do it in 2. Start on the collector side first as the head side is not too bad. There is room to clean up the head side but the collector side is where the problem is. Try it you'll like it. You could do your own for 40 in parts and whatever the new gaskets cost. I am anxious to see how much it helped. Probably does not add much peak hp but the spool HAS to be better. Peak could easily go up a fuzz also.