Stillen isn't bad, but there are better products. Their CAI is pretty stellar on the other hand. Most agree that GTM has the better supercharger kit. Some however have had success with the Stillen unit. Again, I recommend reading all the feedback on the forum, there is a $hit ton of information and opinions.
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Old Car:GTM TSC'd 550whp / 410lbft tq @ 11.88PSI
New Car: Under Construction
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