With regard to a cat-back giving 20rwhp read this link:
http://www.thrashercharged.com/L67_htm/exhaust.shtm
The only way for a 20hp gain is if the existing muffler/s were stopped up or something.
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\'03 GT Cruiser,White w/ Auto Stick, MOPAR Stg. I, AirAid intake,Alpine XM radio w/ 4 MBQuartz, Autometer Lunar Boost and A/F Gauges
\'02 Corvette (510 RWHP/510 TQ)
Member of 11sec. club &
NRA Benefactor Member
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