Focus RS MK3
Unleash the Beast: Focus RS MK3 Performance Upgrades
At Devil Developments, we understand the passion for pushing the boundaries of what your Focus RS MK3 can achieve. Our carefully curated performance package is designed to significantly enhance your vehicle’s power while maintaining the refined OEM feel you love. With the combined expertise of Devil Developments and Motorsport Developments, we bring you a bespoke tuning solution that will revolutionise your driving experience.
Complete Forge Package – Just £4550
Devil Developments is now offering a complete forge package for the MK3 RS.
This includes a new head gasket, stronger head bolts for a superior clamping force, Mahli Motorsport forged pistons, new bearings and steel rods including oil and filter change.
As a full drive-in, drive-out package, the price is just £4550
The process takes 4 days start to finish.
To make a booking, please contact us on the enquiry page or call us on 01903 731194
Comprehensive Power Boost
Our flagship offering includes the Devil Developments big turbo kit, an uprated fuel pump solution, and a custom Motorsport Developments map. This trio of upgrades is engineered to unlock a staggering 490-510bhp and 656NM of torque from a healthy Mk3 Focus RS. Experience exhilarating performance with full boost achieved at a mere 3,000rpm, ensuring a surge of power when you need it most.
Supporting Modifications for Optimal Performance
To fully harness the potential of our tuning package, certain supporting modifications are essential. An uprated intercooler and exhaust system lay the groundwork for durability and efficiency. For those seeking the ultimate in power, a forged engine build is recommended, with the option of Stage 3 camshafts to squeeze out an additional 10-20bhp and up to 40NM of torque. Our 4bar map sensor solution is also included, providing crucial boost cut safety for your peace of mind.
Drive-In, Drive-Out Convenience
Devil Developments offers a seamless upgrade experience with our drive-in, drive-out service. Starting from £7,499, your Focus RS MK3 will be transformed with our performance package, including professional fitting, mapping, and dyno testing to prove the gains. Choose to have the work carried out at our workshop or at Motorsport Developments, based on your preference.
Enhanced Durability with Uprated Head Gasket Package
To complement our tuning package, we now provide an uprated head gasket package complete with warranty. This includes a superior gasket, stronger head bolts for enhanced clamping force, and all necessary machining and parts. An oil change and filter are also part of the deal, ensuring your engine runs smoothly post-upgrade.
Expertise You Can Trust
With more Focus RS MK3 builds under our belt than any other UK provider, including the UK’s most powerful, our expertise is unrivalled. The forging process is meticulously carried out over 3-4 days to ensure perfection. Ready to take the next step? Contact us at 01903 731194 to schedule your vehicle’s transformation.
Your Destination for Focus RS MK3 Tuning
Choose Devil Developments for an extensive range of 35 specialised products, each designed to elevate your Focus RS MK3’s performance. We’re not just a tuning company; we’re a destination for enthusiasts seeking the pinnacle of automotive excellence. Drive better; drive Devil.











































