Stage 3 RSS

BMW S63 4.4T V8 Engine Guide — M5 F90, X5M, X6M The BMW S63 is the twin-turbocharged V8 that has powered BMW's most powerful production cars for over a decade. In its latest and most potent form — the S63B44T4 — it sits in the M5 F90, X5 M Competition, and X6 M Competition, producing up to 617 HP from the factory. This guide covers the S63's distinctive hot-vee architecture, stock output, every tuning stage from a simple ECU flash to 900+ HP builds, known weak points across S63 generations, and the supporting modifications you need at each power level....

BMW B58 3.0T Engine Guide — Supra A90, M240i, M340i, 540i The BMW B58 is arguably the most important inline-six BMW has produced since the legendary 2JZ-GTE era of Toyota collaboration — and ironically, it now powers a Toyota. A 3.0-liter single-turbocharged inline-six, the B58 is the performance backbone of BMW's non-M lineup and the heart of the Toyota GR Supra A90. Found in everything from the M240i and M340i to the 540i and Z4 M40i, the B58 is one of the most tunable platforms on the market today. This guide covers the architecture, Gen 1 vs Gen 2 differences,...

Audi EA855 2.5T Inline-5 Engine Guide — RS3 8Y & TTRS 8S The EA855 EVO 2.5-liter turbocharged inline-five is one of the most celebrated performance engines in Audi's modern lineup. Powering the RS3 8Y and TT RS 8S, this engine delivers 400 HP from the factory and carries a legacy that stretches back to the original Audi Quattro rally cars. For tuners, it represents one of the most responsive and rewarding platforms in the VAG portfolio — capable of reaching 600+ HP with the right modifications. This guide covers everything you need to know about the EA855 EVO architecture, tuning...

BMW S58 3.0T Engine Guide — M2 G87, M3 G80, M4 G82 The BMW S58 is the defining inline-six of the current M car era. A 3.0-liter twin-turbocharged powerplant born from the B58 platform but re-engineered from the ground up for M duty, the S58 is found under the hood of every G-generation M car that matters: the M2 G87, M3 G80, M4 G82, and their X3 M / X4 M siblings. This guide covers the architecture, stock output across variants, every tuning stage from bolt-on to full build, known weak points, and the supporting mods you need at each...

What Is the EA888? The EA888 is the Volkswagen Auto Group's most prolific turbocharged four-cylinder engine platform — and the single most tuned engine in the entire VAG ecosystem. Produced since 2008 and still going strong in 2026, this 2.0-litre TFSI/TSI powerplant underpins everything from the daily-driven VW Golf GTI to the track-weapon Audi S3, plus Seat, Cupra and Skoda performance models worldwide. All EA888 variants share the same fundamental architecture: an 82.5 mm bore × 92.8 mm stroke, cast-iron cylinder block and aluminium cylinder head. That iron block is a big part of why the platform responds so well...