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what is tha best blow off valve and tha loudest.also is there any little tricks or mods i can do without spendin a arm and a leg...so far i got a k&n intake a apexi cat back 3 inch pipin.neuspeed springs(desperate need of shocks)and thats it,i have a goal of atleast 400 horse power.and high 13's

Very descriptive thread title.