Here are results from a 4 system shoot out in May "Sport Truck" Magazine:
System HP Torque Sound
Stock 161.9 227.9 very quiet
Borla 171.5 243.9 quiet at idle;low brumble under load
Gibson 170.5 242.4 quiet idle; deep,smooth note under load
Hedman 171.1 243.6 dull throb at idle; steady throaty sound under
load
Jardine 175.4 246.1 low brumbly sound at idle; smooth rumble
under load
Test mule was 97 CK1500, all dual rear exit, except Gibson (single passenger
side)
Measured on K&N's dyno. Otherwise totally stock Vortec 5.0 V8
Word of advice: Don't obcess on HP gains...you'd never know or feel the
difference between 171 & 175 HP.
Gary Ludwick
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