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Published on Mar 7, 2011
2011 Camaro SS LS3 with Doug Thorley Catback, Doug Thorley Shorty Headers, & Vararam Intake vs 2010 Camaro SS L99 Doug Thorley Catback & Dynomax Racing Bullets exhaust. The LS3 revs up to 5000-5500 RPMs while the L99 revs up to 4000-4500 RPMs.