BK Racing GM Ecotec Performance Cylinder Sleeves (Kit of 4 sleeves)

Ecotec Engine Sleeves for Stronger GM Gen 3 Performance

When building a high-performance GM Ecotec engine, the cylinder block is the foundation of reliability. BK Racing GM Ecotec Performance Cylinder Sleeves were engineered specifically for Gen 3 GM Ecotec engine blocks requiring increased cylinder strength, improved stability, and large-bore capability beyond the limitations of factory cylinder sleeves.

Manufactured from premium centrifugally cast ductile iron with chromium-enhanced wear resistance, these precision-machined dry sleeves are designed for naturally aspirated, turbocharged, supercharged, and sustained high-RPM racing applications. Whether you’re repairing a damaged block or building a serious competition engine, BK Racing sleeves provide the strength and precision serious engine builders demand.

New to Ecotec cylinder sleeves? Before starting your build, read our GM Ecotec Cylinder Sleeve Guide to learn when sleeves are required, how they strengthen the block, recommended bore sizes, and what to expect during installation.

Why Choose BK Racing Ecotec Cylinder Sleeves?

Unlike generic replacement sleeves, BK Racing sleeves were developed specifically for serious Ecotec engine builders.

Every sleeve is individually measured, inspected, and grouped into matched four-cylinder sets based on body diameter and flange dimensions. This additional quality control helps improve installation consistency while providing a more uniform foundation during machining.

Designed for professional engine builders, these sleeves are intended for engines where reliability, cylinder stability, and machining precision are critical.

Designed for Serious Performance

BK Racing Ecotec Cylinder Sleeves are ideal for:

• Circle Track Racing
• Drag Racing
• Road Racing
• Time Attack
• Turbocharged Engines
• Supercharged Engines
• High Compression Naturally Aspirated Builds
• Large Bore Engine Combinations
• Professional Engine Rebuilds

As cylinder pressure and horsepower increase, maintaining cylinder stability becomes increasingly important for ring seal, durability, and long-term engine reliability.

Engine Compatibility

Designed for GM Gen 3 Ecotec engine blocks including:

• LNF
• LDK
• LE9
• LAF
• LEA

Compatible with Gen 3 Ecotec engine architecture.

Bore Capability

BK Racing sleeves can be finish honed from:

• 88.0mm
• 88.5mm
• 89.0mm
• 89.5mm
• 90.0mm
• 91.0mm
• 92.0mm

For most naturally aspirated racing engines, we generally recommend bore sizes between 88mm and 90mm.

Larger bores up to 92mm may be suitable depending on the intended application, cylinder pressure, machine work, cooling system, and overall engine combination.

Approximate remaining wall thickness at a 92mm bore: 0.058”

Features

• Premium centrifugally cast ductile iron construction
• Chromium-enhanced wear resistance
• Precision CNC-machined dry sleeves
• Individually inspected before packaging
• Matched four-cylinder sleeve sets
• Excellent ring seal characteristics
• Designed for naturally aspirated, turbocharged, and supercharged applications
• Professional engine machining recommended

Professional Installation Recommended

BK Racing recommends installation by an experienced performance machine shop.

For best results:

• Measure all components before machining.
• Install sleeves using the proper interference fit.
• Deck the block after installation.
• Finish bore and torque plate hone to final size.
• Verify piston-to-wall clearance during assembly.

As with most high-performance racing sleeves, final machining should always be completed after installation.

For a detailed installation walkthrough, see our How to Install GM Ecotec Cylinder Sleeves guide.

Why Builders Choose BK Racing

BK Racing products are developed through real-world GM Ecotec engine development and competitive racing experience. Every design decision - from material selection to machining tolerances - is focused on producing stronger, more reliable engines capable of surviving the demanding conditions of modern motorsports.

When you’re investing thousands of dollars into an engine build, your cylinder block deserves a foundation engineered to the same standard.

Build a stronger foundation. Build it with BK Racing.

Learn More About GM Ecotec Cylinder Sleeves

Before starting your build, explore our complete collection of technical resources:

• GM Ecotec Cylinder Sleeve Guide
• Why Sleeve an Ecotec Engine Block?
• Choosing the Right Bore Size
• Stock vs. Sleeved Ecotec Blocks
• How Ecotec Cylinder Sleeves Are Installed
• Dry vs. Wet Cylinder Sleeves
• Common Cylinder Sleeve Installation Mistakes
• How Much Horsepower Can Stock Ecotec Sleeves Handle?

Built for GM Ecotec Gen 3 Performance

BK Racing Ecotec Engine Sleeves are designed for GM Gen 3 performance builds that need added strength, better bore support, and dependable fitment. These dry sleeves help restore or reinforce cylinder walls in Ecotec engines, making them a smart choice for street performance, track use, and serious rebuilds. With compatibility in the 88mm–92mm range, they support a wide set of bore sizes while maintaining the precision needed for high-output applications. If you are upgrading an engine that demands stable cylinder control, these sleeves provide a strong foundation for long-term reliability and consistent performance.

Precision Dry Sleeve Design for Stable Cylinder Support

These Ecotec Engine Sleeves use a dry sleeve design, which means they install into the block to strengthen the cylinder area without direct coolant contact. This setup is preferred for many performance builders because it adds durability while preserving proper engine function. Dry sleeves are ideal when the original cylinder walls are worn, damaged, or too thin for the intended power level. BK Racing sleeves are made to deliver accurate dimensions and secure support, helping reduce flex and improve bore stability. That precision matters in boosted, high-compression, or aggressively tuned Ecotec engines where cylinder integrity is essential.

Available in 88mm–92mm Bore Sizes

One of the biggest advantages of these Ecotec Engine Sleeves is the flexible bore range from 88mm to 92mm. This makes them suitable for a variety of engine builds and repair needs, whether you are refreshing a stock block or preparing a custom performance setup. The sizing options give engine builders room to match the sleeve to the desired bore diameter while keeping machining requirements clear and controlled. For shops and enthusiasts alike, this range helps simplify planning and ensures the finished engine can meet the target specifications. It is a practical solution for both restoration and performance-focused machining projects.

Why Choose BK Racing for Your Engine Build

BK Racing is a trusted name for performance engine components, and these Ecotec Engine Sleeves reflect that commitment to quality and fit. Builders want parts that install cleanly, perform consistently, and support the demands of modern horsepower goals. These sleeves are made for customers who need dependable cylinder reinforcement without sacrificing accuracy or engine efficiency. Whether the goal is to repair a damaged block or prepare for a stronger build, BK Racing offers a reliable option for GM Ecotec applications. When you need a durable solution for your next project, these cylinder sleeves help deliver the strength and confidence your engine build deserves.