Darton Dry Cylinder Sleeve Set for BMW S58

Strengthen your BMW S58 engine block with a Darton Dry Cylinder Sleeve Set. These sleeves are designed to replace the factory cylinder liners with a stronger, more durable ductile iron cylinder surface, making them ideal for built S58 engines, high-boost turbo setups, and serious horsepower applications.

The factory S58 block is strong, but when pushing high cylinder pressure, upgraded turbos, aggressive boost, or larger piston setups, the factory cylinder surface can become a limiting point. Darton Dry Sleeves provide a stronger cylinder wall surface and allow the block to be properly machined for a performance engine build.

Features

• Complete set of 6 Darton dry cylinder sleeves
• Designed for BMW S58 engines
• Strong ductile iron sleeve construction
• Replaces the factory cylinder liners
• Designed to support high-boost and high-horsepower applications
• Allows the block to be bored and finished to piston specifications
• Improved cylinder wall strength for built engine setups
• Ideal for forged piston and rod builds
• Recommended for drag, street, roll race, and high-power S58 builds

Fitment

• BMW G80 M3
• BMW G81 M3 Touring
• BMW G82 M4
• BMW G83 M4
• BMW G87 M2
• BMW F97 X3M
• BMW F98 X4M
• Other BMW models equipped with the S58 engine

What Are Dry Sleeves?

Dry sleeves are called “dry” because the sleeve body is not directly exposed to coolant inside the block. They are installed into the block with an interference fit, creating a strong and stable cylinder surface without coolant surrounding the sleeve body.

Important Install Notes

All Darton sleeves come from the factory slightly smaller than the final bore size. These sleeves must be professionally installed, finish bored, and honed to match the exact piston specifications being used in the engine build.

Darton recommends that aluminum block cylinder walls be lightly honed with Brush Research bumble hones before sleeve installation. Proper surface preparation on both the block and sleeve helps improve sleeve fitment and heat transfer.

Professional machine work is required. These sleeves are not a drop-in part and should only be installed by an experienced machine shop or engine builder familiar with aluminum BMW S58 blocks.

Recommended For

• Built S58 engines
• Forged piston builds
• Upgraded turbo setups
• High-boost applications
• Drag racing builds
• High-horsepower street cars
• Engine builders looking to reinforce the S58 block