wish i would have seen this before RSDs. i thought rsds was a bust. but with spending 800ish on a stall and install at a shop i saw NO IMPROVEMENT! car ran great. i installed a msd 2 step as well. no gains. was VERY surprising. just switch rear tires from a 275/60/15 hoosier dr to a 275/50/15 mt dr. so hopefully the smaller tire with give me a better ET. next is a cam upgrade hopefully this week.