Maintaining the legendary 5-cylinder warble of the 2005-2011 Ford Focus ST225 (also known as the Mk2 Focus ST or XR5) requires strict adherence to routine maintenance intervals. The Volvo-derived 2.5-litre turbocharged HYDA engine is a torque-rich powerhouse, and keeping it running flawlessly starts here. Take the guesswork out of your maintenance schedule with our complete Service Kits, packed with the exact premium Engine Fluids required for your 5-cylinder motor. Protect against oil contamination with high-flow OEM-quality Service Filters, and prevent misfires under heavy boost by upgrading to high-performance step-colder Spark Plugs engineered specifically for tuned ST225 powertrains.