AfE Power 49-46001-1P Cat-Back Exhaust System In-house dyno testing produced gains of up to +26 horsepower and +30 lbs. x ft. torque A straight through designed, free-flowing stainless steel muffler is used to absorb high pitch tones Constructed of 3" mandrel bent stainless steel tubing for maximum flow This exhaust system willnot fitthe X-Runner V6-4.0L. Fits Toyota Tacoma 05-12 V6-4.0L