Gt-40 vs. GT40p vs. GT40X
Hey guys, i would like to get some new heads for my stang, as i know these really open it up. I am very interested in getting some GT-40 heads, but what is the difference?? Gt40 Gt40p and GT40X? What is the diff? GT40p's came on explorers right? Also, how much HP would i be looking at with a new set of heads, in a gain wise. THANKS!!!
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1988 Mustang 5.0 LX Convertible
-Mac Cold Air Intake
-K&N Cone Filter
-9mm FMS Spark Plug Wires
-Hedmann Headers 2.5" O/R H-Pipe
-Flowmaster 40 series 2.5" Catback
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