mountuneusa.com Toggle Search Account Checkout Cart Shop Performance F-150 Raptor Performance F-150 Raptor Body & Cargo F-150 Raptor Intake & Exhaust F-150 Raptor Suspension F-150 Raptor ECU Tuning & Programming F-150 Raptor Power Fiesta ST Performance Fiesta ST Brakes Fiesta ST Drivetrain Fiesta ST ECU Tuning & Programming Fiesta ST Intake & Exhaust Fiesta ST Interior / Styling Fiesta ST Suspension Fiesta ST Power Fiesta ST Wheels Focus RS/ST Performance Focus ST/RS Brakes Focus ST/RS Drivetrain Focus ST/RS ECU Tuning & Programming Focus ST/RS Intake & Exhaust Focus ST/RS Interior / Styling Focus ST/RS Power Focus ST/RS Suspension Focus ST/RS Wheels Focus RS Performance Parts Ranger Performance Ranger Body & Cargo Ranger ECU Tuning & Programming Ranger Intake & Exhaust Ranger Power Ranger Suspension Bronco Performance Honda K20C1 Performance EcoBoost Performance Packages Fiesta ST Packages Focus ST Packages Focus RS Packages F-150 Raptor Packages MRX Performance Series MRX Series for F-150 Raptor MRX Series for Fiesta ST MRX Series for Focus RS/ST Street Legal Performance Ford Fiesta ST Ford Focus RS Ford Focus ST Ford Trucks Parts & Components Browse by Engine Honda K20C1 Engines Ford EcoBoost Engines Ford Duratec Engines Ford Kent & Lotus Based Engines Browse by Components Brake Systems Cooling Systems Crate Engines Drivetrain Systems Engine Internals Engine & Transmission Mounts Exhaust Systems Fuel Systems Hoses & Clamps Ignition & Electrical Systems Intake Systems Intercooler Systems Oil Systems Specialty Tools Suspension Systems Turbochargers Browse by Manufacturer Mountune Mountune Racing Engines ACL Race Series ACT Clutch AEM Performance Callies Performance COBB Tuning Fifteen52 Wheels Ford Performance Giro Disc JE Pistons Motorcraft Motul Piper Cams Powerflex Bushings Quaife Differentials Radium Engineering SCAT Crankshafts Stoptech Brakes Supertech Performance Syvecs ECU XClutch Xtreme-DI Motorsport Engine Building & Assembly Engine Development & Machining Engine Testing & Data Acquisition Engine Parts & Component Restoration Mountune Racing Engines Ford EcoBoost 4-Cyl. Engines Ford EcoBoost V6 Engines Ford Kent & Lotus Engines Honda K-Series Engines Merch & Gear WINTER SALE Search site Submit search Nav Menu 2 Nav Menu 3 Nav Menu 4 Nav Menu 5 Nav Menu 6 Nav Menu 7 Nav Menu 8 Home > Shop Performance > Focus RS/ST Performance > Focus RS Performance Parts > RS Power Upgrades Focus RS Power Upgrades Sort By: Price: Low to High Price: High to Low Most Popular Title Manufacturer Newest Oldest Availability 30 per page 60 per page 120 per page 180 per page 300 per page 1 mountune Focus RS MRX Turbocharger Upgrade Price:$4,399.00 mountune Ultra high-performance silicone boost hose kit - Focus RS Price:$315.00 (1) mountune Uprated Air Recirculation Valve - Focus RS Price:$169.00 (36) 2.0L/2.3L Complete EcoBoost Oil Control System Price:$289.00 (6) Radium Engineering Crankcase Catch Can Kit - Ford Focus RS Price:$229.95 (4) Radium Engineering Coolant Tank Kit - Focus ST/RS Price:$374.56 (4) NGK Iridium Spark Plug Set LTR71X-II Price:$49.00 (88) mountune High Performance 2.3L Focus RS / Mustang Short Block Price:$5,899.00 (1) mountune Triple Pass Radiator Upgrade - Focus RS Price:$569.00 (14) mountune Cast Alloy Intake Manifold - Focus RS / ST Price:$1,199.00 (4) mountune Magnetic Oil Drain Plug - Focus ST / RS / Ranger Price:$24.99 (31) mountune High Performance 2.3L N1 Stroker Focus ST Long Block Price:$7,999.00 (1) mountune High Performance 2.3L MRX Stroker Focus ST Long Block Price:$9,950.00 mountune High Performance 2.3L Closed Deck Focus RS Short Block Price:$5,500.00 2.3L EcoBoost Engine Gasket Set Price:$525.00 Sale price:$499.00 Savings: $26.00 (1) High Flow Direct Injection Fuel Injector Upgrade Focus RS/ST Price:$1,399.00 High Flow Direct Injection Fuel System Upgrade Focus RS 2.3L Price:$2,949.00 Sale price:$2,499.00 Savings: $450.00 Mountune ICR Head Gasket - 2.3L Ford Ecoboost / Focus RS Price:$139.00 (2) Motorcraft Spark Plug Set - SP-550 Focus ST & RS Price:$31.24 (21) mountune High Performance 2.3L N1 Focus RS Long Block Price:$9,899.00 mountune High Performance 2.3L MRX Focus RS Long Block Price:$14,499.00 ARP High Performance Cylinder Head Stud Kit, 2.0L & 2.3L EcoBoost Price:$224.00 Sale price:$209.00 Savings: $15.00 ARP High Performance Main Stud Kit, 2.0L & 2.3L EcoBoost Price:$179.00 Ford Focus RS - 2.3L EcoBoost - Oil Change Kit Price:$139.45 Sale price:$126.31 Savings: $13.14 mountune High Performance 2.0L MRX Focus ST Long Block Price:$9,450.00 Xtreme-DI High Pressure Fuel Pump Upgrade, Focus RS Price:$1,399.00 1
