Engine / Gearbox Building

Valve Spring Upgrade

Built to Handle Power. Designed for Reliability.

At SL Autowerkes, we specialise in engine / gearbox building for European vehicles, performance applications, and high-stress driving conditions. Whether you’re chasing big numbers on the dyno or preparing for track and race use, we build engines and transmissions with real-world reliability in mind — no shortcuts, no guesswork.

Our engine / gearbox building services are tailored to your platform, power goals, and intended use. From forged internals and sleeved blocks to upgraded clutches and strengthened gearsets, we engineer every build to perform under pressure.

Engine / Gearbox Building Services Include:

  • Complete Engine Rebuilds & Blueprinting

  • Crank Hub Replacement (S55 Only)

  • Forged Pistons, Rods & Crank Upgrades

  • Closed-Deck Conversion & Block Sleeving

  • High-Performance Head Work & Valve Trains

  • Strengthened Gearbox Internals (DSG, ZF, Manual)

  • Clutch & Flywheel Upgrades for High Torque

  • Balancing, Assembly & Break-In Procedures

  • Race & Track-Spec Engine / Gearbox Packages

  • OEM+ Builds for Daily-Driven Reliability

Crank Hub SL
Engine & Gearbox Building

Platforms We Build:

  • BMW (B58, N54, S55, S58, N55)

  • Volkswagen / Audi (EA888, RS3, S3, MQB)

  • Mercedes-AMG (M177, M133, M139)

  • Porsche Turbo / Cayenne / Macan / Panamera

  • Cupra, Skoda, MINI and other many other platforms

From BMW and Audi platforms to high-performance Porsche and Mercedes-AMG builds, we specialise in developing custom solutions tailored to a wide range of vehicles — including Cupra, Skoda, MINI and many more.

To discuss a build for your platform, contact our team today.

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Frequently asked questions

It includes full disassembly, inspection, and reassembly with upgraded performance parts — designed to handle more power and stress than stock setups.

If you’re planning a big-power build, track use, or have experienced drivetrain issues at higher power levels, a reinforced setup ensures long-term durability.

Yes. We offer fully forged engine builds with upgraded pistons, rods, bearings, and other internals — ideal for turbo upgrades and Stage 3+ power levels.

Absolutely. We reinforce DSG, ZF, and manual transmissions with upgraded clutches, gearsets, and cooling systems to handle increased torque and aggressive driving.

Yes — all Engine / Gearbox Building is done in-house at SL Autowerkes by technicians with real-world race and tuning experience.

We specialise in European platforms including BMW (B58, N54, S58), Audi, VW (EA888), Mercedes-AMG, Porsche, Cupra, and more.

Definitely. We provide full consultation for Engine / Gearbox Building, helping you choose the right components and setup for your goals — street or track.

Often you’ll want upgraded cooling, fueling, a performance tune, and stronger drivetrain components to support the extra power safely.

Yes, in most cases, it will. But we build for reliability and offer post-build support, including tuning and servicing.

Depending on parts and scope, a full build typically takes 2–4 weeks. We’ll confirm timeframes during your consultation.