2013-2018 Ford Focus ST Roush Cat Back Exhaust & Cold Air Engine Intake Kit

•Brand New
•Roush Performance part #s 422065 & 421610
•Fits 2013-2018 Ford Focus ST
•Kit includes Roush Cold Air Kit & Cat Back Exhaust

Roush Cold Air Kit
•Roush Performance part # 422065
•Premium Re-usable Air Filter with Mounting Clamp
•High-flow 3" Induction Tube with OE Quality Fit and Finish
•Custom-formed, ROUSH-branded Nylon Airbox Tray
•Utilizes Factory PCM Calibration
•Air Resources Board approved: EO No. D-418-30
•ROUSH 90-Day Limited Warranty


From baseline to redline, ROUSH Performance has you covered with the all-new 2013-2017 Ford Focus ST, 2016-2017 Focus RS Cold Air Intake System. The engineers at ROUSH designed this kit for improved performance you can hear and feel!

All components in this system are direct replacements to the restrictive stock intake, from the air filter to the turbo inlet. This free-flowing air intake kit contains a custom ROUSH-branded air box that is topped with EPDM foam for an airtight seal to the hood. Also included is a premium high-flow air filter that is re-usable simply by washing and oiling. The 3" high-strength induction tube has a black texture finish for an OEM fit and finish. You will also receive a premium, silicone coupler that features reinforced, weaved fibers for a superior seal between the induction tube and the turbo inlet.

The engineers at ROUSH Performance kept the customer in mind when fabricating this kit by utilizing the factory PCM calibration, which will not void your factory engine warranty. In addition to long-lasting, durable components, this kit keeps the factory PCV connection so no drilling or cutting to any of the components are required.

Installation is quick and simple, installing in less than one hour with basic tools. All mounting clamps and hardware is also included in this kit, which carries the standard ROUSH 90-Day Limited Warranty.

Click here for video!

Roush Cat Back Exhaust System
•Roush Performance Part # 421610
•High-flow 3" cat-back system
•Made of high-quality 409 stainless steel
•Includes chrome-flashed 304 stainless steel tips
•Utilizes same factory mount locations
•ROUSH 3 Year/36,000 Mile Limited Warranty included
•Check local noise ordinances for legality


Pump up your Focus with the ROUSH Performance High-Flow Exhaust System. This exciting new kit from Roush combines raw performance with a deep, throaty note to take the ordinary sport-compact to a sport-tuned machine.

The high-flow, cat-back system features larger than stock, 3" diameter piping.This system is also made entirely of T409 stainless steel, providing you one of the most durable and affordable exhaust systems on the market. Even better, all pipes have been manufactured with CNC mandrel-bend tooling, allowing for unrestricted airflow. This system also features a straight-through, perforated-tube muffler for optimum exhaust tone. To complete the look, a set of round, dual 4" diameter T304 stainless steel tips have been chrome flashed and designed with a rolled edge. As with all of Roush's round exhaust tips, the traditional Roush wordmark has also been neatly stamped on the end, letting everyone know that you mean business.

Click here to view Roush's installation video for the 422065 Cold Air Intake Kit