Haha boy u guys are missing out not having the sprint booster! I thought the same until I ran out of mods to do... I would say 100% certain the sprint booster was the best mod it doesn't add HP but sure does make it feel like it adds a good 50! The dcai Eurotune and sp is all you need other mods you barely tell the difference! Unless you pump a lot of $$ into the engine , only mod ill be doing next is the begi turbo and ill be set! To finally keep up with the newer v8s out there