Originally Posted by Indyblue98
I read similar claims from mutiple vendors ...530 RWHP on a Stock L99
However , my suggestion is to contact Whipple direct,
what I was told 18 months ago by the Whipple Rep was 440-460 on an L99
and 490-510 on a LS3 .
Before headers I was at 456 ...From a reputable installer.
After Headers and a Pulley change I am at 505 and 8-9 lbs boost.
I have the L99 currently with Headers, Long Tubes, CAI and Tune. Here is my sheet below...
I was told if doing Whipple only along with current mods it would near 500 HP but doing the LS3 conversion with Whipple would put well over 600 HP