You can change the crank pulley to up the boost too, you don't "have" to change the pulley on the blower itself to up the boost. Thats what I did to save the warranty. I never tried fordspeed.com but coming from Jeff, I just may have to try them sometime. I have tried Jegs, I like them just as well as summit. Heck, its hard to tell them apart, they are very close(very close) to each other.
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