big bore kit for 420a

[mdost03]

Hey blesi660r, if you check out some of the threads on DSMTuners in the 420a section, a guy just recently made about 450 whp on the 420a with mostly tuning as the major modification. The 420a responds extremely well to boost surprisingly. He also ran a mid 11 I think using stock axles, no LSD, and slicks. He has videos and slips to prove it all. He also ran 16 psi on a stock engine from valve cover to oil pan for a whole year before he decided to build up the engine. So it pretty much comes down to how well your tuning is for your car. He is running a Hahn Portfueler for tuning and his name on tuners is awddynamite.