Berk Technology BT1068 Toyota MR2 Turbo Dual 3.0-inch Exhaust System Dyno proven to produce 20-50RWHP over stock True 3.0-inch system, tubing and muffler cores Custom made muffler bodies specifically designed for the SW20 chassis Dual 4.0-inch slash cut, polished stainless steel tips Dual layer muffler packing to control unwanted drone