The new R&D Free-Flow Exhaust Kit eliminates the all plastic power robbing sound suppression system with a opened up and re-routed design allowing the exhaust to travel out of the water box with zero restriction and back pressure. Improves acceleration and top speed Performance averages. The R&D Free Flow Kit is manufactured from oversized CNC precision mandrel bent aluminum tubing and is coupled with High Temperature Silicone Hoses and performance clamps guaranteed to handle higher exhaust temperatures. The R&D kit gives your 260X the performance “Muscle Car” sound it deserves. The R&D kit removes ALL the unwanted plastic exhaust parts.