Results from the Dyno
Ford Before: GMC Before:
348.39 hp at 5,650 rpm 332.12 hp at 5,650 rpm
369.49 lb-ft of torque at 4,550 rpm 344.85 lb-ft of torque at 4,250 rpm
   
Ford After: GMC After:
517.54 hp at 5,750 rpm 477.25 hp at 5,950 rpm
481.38 lb-ft of torque at 5,450 rpm 430.92 lb-ft of torque at 5,550 rpm
   
Total Gain:  
169.15 hp or plus 49% 145.13 hp or plus 44%
111.89 lb-ft of torque or plus 30% 86.07 lb-ft of torque or plus 25%

Our Honest Opinion
Well, what would a battle be without a little suspense? Right out of the gate, both trucks were worlds away from the original power levels. As long as some self-restraint was exercised, it could barely be determined that anything had happened to either truck. Noise levels under the hood were kept to a minimum and each vehicle could be driven without garnering the attention of any local peace officers. Of course, that just isn't any fun, so we stabbed at the throttle of both trucks mercilessly with grins that might still be stuck on our faces. Fun isn't even the word for it.

SOURCE
ProCharger
14801 W. 114th Terrace
Lenexa
KS  66215
913-338-2886
http://www.procharger.com