PART 1 I had my L on the dyno at 600 mi all stock it maid 327 rwhp.yesterday had it back on the dyno with the air raid intake and duel 2.5" flowmasters it made the same numbers 327rwhp.yesteday test was done at RPM in Santa rosa Ca home of flowmaster RPM has done testing for them. they have seen a 16 HP gain with some systems...IF you are looking up your tail pipe for big HP gain you are looking inthe wrong end of the truck.... Part 2 THE SOUND I bought flowmasters becuse I love the sound.some people don't. Mufflers are more about geting your truck our car to sound the way you whant SO you loose 2 or 3 HP as long as you like the it enjoy it.

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Red OO Lightning born 8-14-00 brought home 9-16-00 Mod are the usual suspects.Air Raid intake, R9 superchip,Duel Flowmasters,2" drop out back...