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Old 05-30-2014, 08:42 AM   #21
Blown355

 
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Drives: 2017 ZL1 A10
Join Date: Sep 2009
Location: Austin TX
Posts: 866
Bottom line, if you only picked up 35 rwhp going from the stock pulley to a 2.55 upper and a tune, somethings not right. Search around on this site at some of the before and after numbers for the same mods you added.
With just a 8.6 lower, LT with cats and a CAI, I picked up 60 rwhp.
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