lol.. npp exhaust.. they'll hear you before they see you! i did the whole washer bottle, air scoop mod. there is a thread showing the various gains. some websites/vendors use different methods for measuring. the thread sort of put that into perspective. let us know what you go with!
"The fact the GT500 can barely beat a $37k car with 200 less horsepower speaks volumes. There are about a million mods you can do to a LS3 to make a Camaro do the 1/4 faster then a GT500." (Vroom.)
Updated w/ Willow Springs:
1. Nissan GTR Track Pack 1:19.6 2. Ducati 1198 S 1:19.7 3. Nissan GTR 1:20.3 4. Corvette Z06 1:20.4
5. Audi R8 V10 Plus 1:22.0 6. Ferrari 458 Italia 1:22.3
7. CAMARO SS 1LE 1:22.7
8. Shelby GT 500 1:23.5
9. Mustang Gt Track Pack 1:25.8