VAC Motorsports' Flanged Cylinder Sleeves are the ultimate foundation for your high-performance BMW S68 build. Crafted from centrifugally cast ductile iron, these sleeves are precision-machined in-house and designed to handle the extreme demands of today's boosted and high-horsepower applications.
Whether you're chasing displacement, higher boost levels, or increased engine longevity, our flanged sleeves deliver unmatched durability, superior heat dissipation, and the strength to support serious power.
🔧 Key Benefits of VAC Engine Sleeving:
✅ Increased Bore Size
Gain displacement and power by safely increasing bore size, giving your build more room to breathe and deliver torque.
✅ Extreme Strength Under Stress
Ductile iron is significantly stronger than factory alusil under high cylinder pressures--ideal for turbocharged, supercharged, or high-compression applications.
✅ Custom Cylinder Wall Thickness
Thicker cylinder walls support aggressive builds and allow tuning flexibility, especially in high-boost environments.
✅ Superior Heat Dissipation
Efficiently manages the extreme temperatures of performance driving, helping prevent hot spots and detonation.
✅ Enhanced Engine Longevity
Protect your investment--our sleeves reduce the risk of cracking and catastrophic engine failures common in high-stress builds.
✅ Designed for High-Performance Modifications
Built to work seamlessly with forged pistons, advanced camshaft profiles, and forced induction systems.
📌 Installation Note:
Engine sleeving is not a DIY job. This is a complex, high-precision process that should be performed by experienced machine shops familiar with BMW engine blocks. VAC Motorsports offers full in-house sleeving services backed by decades of engine-building expertise. Contact our team for build consultations and component guidance.
📍 BMW S68 Applications:
🔩 VAC Motorsports - Engineered to Win. Built to Last.
Proudly made in the USA.