Add dyno-proven power to your Ford Focus RS with this Twisted Steel down-pipe which produced up to +10 horsepower and +14 lbs. x ft. torque max gains as measured on our in-house dyno. 3" mandrel-bent, 304 stainless steel tubing and high flow, 400 CPSI catalytic converter improves exhaust flow to deliver increased horsepower and torque. This direct bolt-on down-pipe requires no cutting or drilling for a hassle-free installation. Performance Gains: In house dy no testing produced gains of up to +10 horsepower and +14 lbs. x ft. torque. Includes 3rd O? bung: This down pipe includes a 3rd O? bung and plug for either a wide-band O? gauge or auxiliary instrumentation. 304 Stainless Steel Construction: This down pipe is constructed of 3" mandrel-bent, 304 stainless steel tubing for maximum flow and corrosion resistance. High-Flow Catalytic Converter: This system utilizes a 400 CPSI (cell per square inch) high flow catalytic converter for maximum flow. Laser Cut Flanges: Quality laser cut flanges mount directly to OE mounting locations for a leak-free sealing surface. 6" Interlock Flex Pipes: This unit utilizes heavy duty 6" flex tubes with internal interlock liners. TIG-Welded: 100% TIG-welded for race proven strength and durability. Additional Power: Combine with cat-back (49-33104) for gains of up to +19 horsepower and +25 lbs. x ft. torque. Legality; This is a "Race Only" product used solely for competition. Its use is limited to closed-course and open-course racing that is formally sanctioned by a recognized racing organization. Any other use including recreational off-road use could be in violation of local, state and federal laws. This system is not currently CARB exempt and is not available for sale in California or for use on any vehicle registered with the California Department of Motor Vehicle. Twisted Steel Down Pipe 3 IN 304 Stainless Steel w/ Cat Ford Focus RS 16-18 L4-2.3L (t) Ford Focus RS 16-18 L4-2.3L (t)