Re: cheap 6637 ???
I found them on a website for $26 plus shipping from somewhere in Arizona. I have it saved on my home computer. I will try to post the link tonight. I found the original link on here though.
97 F 350 CCLB DRW, 3in dp to 5 inch Diamond Eye, zf5, 4wd conversion, intercooled, 315/75/16's
E99 F 350 CCLB 4X4, Diamond Eye 5 inch exhaust, boost, pyro, oil temp, zf6, 6637, PHP Hydra, lifted on 35's, Valair clutch
09 Harley Ultra, Rush pipes, Stage 1 tune