aFe MACHForce XP Exhausts Cat-Back SS-409 EXH CB Toyota Tacoma 05-13 V6-4.0L (Blk Tip)aFe MACHForce XP Exhausts Cat Back SS 409 EXH CB Toyota Tacoma 05 13 V6 4. 0L (Blk Tip) Introducing the new aFe Power MACH Force XP dual exhaust system for the 05 09 Ford Mustang V6 4. 0L. In recent testing, this system produced 12 horsepower and 16 lbs. x ft. of torque. This exhaust is constructed from 2. 5in. mandrel bent, stainless steel and is MIG welded. Dual high flow, stainless steel, single in, single out mufflers are used to maximize