I have a 97 f150 xlt 4x2 and I was wondering where I could get an H-Pipe with high flow cats for the 4.2 v6. Can I buy this or would I have to have this custom made. If I have to have it custom made, how much would that cost. I also want to know if this is even worth doing because I don't want to spend my money on something that wouldn't help me.