By Natasha Davis 
Introduction to the S55 Engine
The S55 engine, found in the BMW F80 M3, F82/F83 M4, and F87 M2 Competition, is a masterpiece of German engineering. With its twin-turbo inline-six setup, the s55 delivers a solid foundation for performance tuning. At Rvng RaceWorks, we specialize in helping enthusiasts unlock every ounce of potential from their S55 platform with precision upgrades and proven parts.
Why the S55 is Built for Upgrades
BMW designed the S55 with performance in mind. Unlike earlier turbocharged inline-sixes, the S55 features a closed-deck block, forged internals, and efficient cooling. These design elements mean the S55 can handle substantial power increases without sacrificing reliability when built and tuned correctly.
At Rvng RaceWorks, we’ve seen countless S55 builds exceed 600–700+ horsepower with the right combination of mods and tuning. Whether you’re aiming for street dominance or track performance, the S55 is an ideal candidate for intelligent upgrades.
Essential S55 Bolt-On Modifications
Intake System
One of the first steps in upgrading the S55 is improving airflow. Upgrading the intake system allows the engine to breathe better, increasing efficiency and turbo response. A high-flow dual cone intake specifically designed for the S55 will reduce restriction and amplify turbo noise, giving you that aggressive whoosh every enthusiast loves.
Downpipes
The factory downpipes on the S55 are restrictive and hold back performance. Replacing them with high-flow or catless downpipes dramatically improves exhaust flow and turbo spool. This is one of the most transformative mods for the S55, both in terms of power and sound.
Charge Pipes and Intercooler
Plastic OEM charge pipes are a known weak point on the S55. Upgrading to aluminum charge pipes prevents cracking under pressure and improves airflow. Pair this with a larger front mount intercooler, and your S55 will run cooler under load—critical for track days or aggressive street driving.
Exhaust Systems
A performance exhaust system complements other bolt-ons, letting your S55 engine exhale freely. Options range from axle-back systems to full titanium setups, all designed to reduce backpressure and unleash the signature S55 sound.
Advanced S55 Upgrades for Serious Power
Fueling Upgrades
Once you push past 550whp, your S55 will need more fuel. Upgrading to a high-pressure fuel pump (HPFP), port injection, and ethanol capability (E85) will ensure your build has the fueling needed to support big boost levels. Rvng RaceWorks offers complete fueling kits tailored for S55 engines.
Turbo Upgrades
Stock S55 turbos are capable but limited. For those chasing 700–1000+ horsepower, hybrid turbos or full-frame turbo kits are the next step. Turbo upgrades drastically change the character of your S55, delivering immense top-end power and torque. With proper tuning, upgraded turbos on the S55 platform are reliable and responsive.
Engine Tuning
All mechanical upgrades on the S55 require precise engine tuning to function at their best. Whether using custom E85 maps, OTS tunes, or dyno tuning, the S55 responds exceptionally well to software optimization. Rvng RaceWorks partners with top tuners to ensure your S55 runs safely while maximizing performance gains.
Supporting Mods for Reliability
Power means nothing without reliability. Supporting mods like upgraded radiators, oil coolers, and baffled oil pans are essential for S55 longevity—especially in high-heat or high-G situations. We recommend preventative upgrades once you begin pushing the S55 beyond stock output.
Additionally, clutch and drivetrain components should be considered for manual S55 models. Upgraded clutches, driveshafts, and differentials are available to keep up with power increases.
S55 Maintenance Is Key
Performance is exciting, but maintenance is critical. Keep your S55 engine healthy with regular oil changes, proper spark plug intervals, and high-quality fluids. At Rvng RaceWorks, we offer packages that combine power and longevity so your S55 build stays strong for the long haul.
The RVNG Advantage
At Rvng RaceWorks, we don’t just sell parts—we live the platform. Our team of passionate enthusiasts builds and drives S55-powered cars daily. Whether you’re doing basic bolt-ons or a full-blown turbo build, we guide every customer through the right parts for their goals. Every S55 product we offer is tested, proven, and priced to deliver value without compromise.
Conclusion
The S55 engine is one of the most capable performance platforms in BMW’s history. With the right upgrades, tuning, and support, it transforms into a monster on the road or track. From intakes and downpipes to turbos and fueling systems, Rvng RaceWorks is your one-stop shop for unlocking the true potential of your S55. Upgrade smart. Upgrade with precision. Upgrade with RVNG.