DG Shelby Posted April 9, 2014 Report Share Posted April 9, 2014 I was wondering if anyone had any feedback, and if anyone had comparison numbers in HP Link to comment Share on other sites More sharing options...
old man Posted April 13, 2014 Report Share Posted April 13, 2014 I was told by Brenspeed that a larger throttle body on a stock motor wasn't needed .But the under drive pulleys do help horse power. Sorry I don't have numbers Link to comment Share on other sites More sharing options...
old man Posted April 13, 2014 Report Share Posted April 13, 2014 Sorry but this info was for the 4.6 engine. Link to comment Share on other sites More sharing options...
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