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2007 gt500 power adders questions

1K views 1 reply 2 participants last post by  JonR2006 
#1 ·
just bought a 2007 Shelby gt500
mods r
American racing longtube headers/xpipe
magnapack magnaflow exhaust
c&L intake
tune

I haven't dynode the car yet but im adding 2.50 upper pulley and 10% overdrive lower pulley and retune

any idea on how much rwhp I should be at? ive seen many pulley/intake/tune dynos but none with headers x pipe and full 3inch exhaust already there
 
#2 ·
I would venture to say the Long Tube Headers and full exhaust would add anywhere from 30-50RWHP...kind of a wild/educated guess..
 
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