The BMW S54 engine — the heart of the legendary E46 M3 and Z4M — remains one of the finest naturally aspirated inline-six engines ever built. With its silky-smooth revs, individual throttle bodies, and motorsport pedigree, it’s a masterpiece of German engineering. Yet, even perfection can be improved upon.

At VAC Motorsports, we took the already iconic S54 and gave it something it never had from the factory: more displacement, more torque, and more headroom for power. The result? Our VAC Motorsports 3.5L S54 Stroker Kit — the definitive solution for builders chasing big power or big RPM.

Built for Any Ambition — Boosted or Naturally Aspirated

Whether your goal is a low-compression, forced-induction setup or a high-revving, naturally aspirated race motor, this is the end-all choice for the S54 platform. The VAC 3.5L Stroker Kit transforms the 3.2L inline-six into a torque-rich, high-capacity beast that delivers power and response across the entire rev range.

Every kit is engineered and machined in-house using 4340 billet steel and premium forged internals — the same materials trusted in our professional racing programs. Each rotating assembly is balanced to exacting tolerances to ensure long-term reliability under the most extreme conditions.

Proven Performance, Engineered by Experts

VAC Motorsports has been pushing the limits of BMW performance for over 40 years. Our stroker kits are trusted by professional race teams and enthusiasts worldwide. The S54 3.5L package is the result of thousands of hours of R&D, CAD modeling, and real-world testing — both on the dyno and the track.

When paired with the right supporting components, the results are nothing short of astonishing.

Featured Build Components

The engine pictured showcases the 3.5L Stroker Kit alongside:

• CSL Carbon Airbox – Classic induction sound meets modern efficiency
• Billet Dry Sump Kit – Maximum oil control for high-G cornering
• Fabspeed Motorsport S54 Headers – Unleash superior exhaust flow
• ATI Harmonic Damper with VAC Underdrive Crank Pulley – Reduce parasitic loss, stabilize harmonics
• VAC Billet S54 Underdrive Pulley Set – Precision-machined for strength and balance
• VAC Motorsports VANOS Elimination Kit, BMW S54 -

The Only Choice for Your Next S54 Build

If you’re serious about power, durability, and precision, this is your foundation. The VAC Motorsports 3.5L S54 Stroker Kit isn’t just an upgrade — it’s an evolution of BMW’s finest inline-six.

Want one for your S54 engine?
Contact us to spec your build: sales@vacmotorsports.com

Shop S54 Parts online: store.vacmotorsports.com