Best Car Engine Valve Shims of 2025

The X AUTOHAUX Shim Spacer is designed to fit larger diameter stems to smaller handlebars, specifically converting sizes from 25.4 to 31.8mm. Made from durable aluminium alloy, the spacers are resistant to rust and corrosion, ensuring longevity. Their precise shape enhances friction, preventing any slippage during rides, which boosts your safety. Installation is straightforward; you simply place the shim between the handlebar and stem, making it easy to adjust your bike without hassle.

The Comp Cams Shim Kit is essential for your next engine build or spring upgrade. It ensures precise installed height on intake and exhaust valves, which is crucial for optimal performance. Made from high-quality materials and heat-treated, these shims are designed to withstand even the most extreme camshaft profiles. With an outside diameter of 1.437 inches and a thickness of 0.030 inches, this kit includes 16 shims, providing you with the reliability needed for consistent spring seat and open pressures.

The Spicer Shim Kit is designed specifically for differential carrier bearings, making it an essential component for various Jeep models, including the Cherokee and Wrangler from different years. This kit ensures proper alignment and adjustment of your vehicle's differential, enhancing performance and longevity. By using this shim kit, you can achieve a smooth and efficient operation, reducing wear and tear on vital components. It is compatible with a range of models, providing versatility and convenience for Jeep owners.

The TARAZON Valve Shim Kit offers a comprehensive selection of 47 different shim sizes, ensuring you have the right fit for your CRF150R and CRF250 models. Made from durable Cr12MoV steel, these shims maintain compatibility with OEM cam adjustments, providing peace of mind during installation. With sizes ranging from 1.20mm to 3.50mm in precise 0.05mm increments, you can fine-tune your engine's performance with ease. Additionally, the included 32-blade feeler gauge simplifies the process of measuring clearances, making your adjustments more accurate and efficient.

The Hot Cams Valve Shim Kit is a complete shim kit designed for various KTM Adventure, Street, Super Duke, and Enduro dirt bikes. It meets or exceeds OEM specifications, ensuring a perfect fit and reliable performance for your vehicle. This compatibility allows you to easily replace worn shims, enhancing your bike's engine efficiency. Additionally, the kit includes 100% new aftermarket parts, giving you peace of mind that you're using high-quality components for your motorcycle's maintenance.

The Kawasaki KX250F Valve Shims kit includes 47 pieces, each with a diameter of 7.48mm and varying thicknesses from 1.20mm to 3.50mm in 0.05mm increments. This variety allows you to easily select the right shim for your needs, ensuring optimal engine performance. Made from durable carburising steel, these shims are built to last. The top of each shim features a size label for quick identification, saving you time during installation or replacement. This high-quality kit is available at an affordable price, making it a great choice for motorcycle maintenance.

The MUYIDP Valve Shim Kit includes 47 pieces, each measuring 7.48mm in diameter, allowing you to find the perfect thickness for your needs. With sizes ranging from 1.20mm to 3.50mm in 0.05mm increments, you can easily adjust your bike's valve clearance for optimal performance. Designed to fit various models from Honda, Kawasaki, Suzuki, and Yamaha, this kit ensures compatibility across popular dirt bikes. Made of high-quality carburizing steel, it offers durability while the size markings on each shim allow for quick identification during maintenance.

The Motion Pro Valve Shim Tool is designed specifically for adjusting valve clearance on twin cam models. Made from hardened alloy steel, this tool ensures durability and strength during use. It conveniently holds the valve spring bucket down, allowing you to easily remove and replace adjusting shims. This feature not only simplifies the task but also saves you time and effort when making necessary adjustments to your engine.

The Moroso Distributor Shim Kit is designed specifically for vehicle applications, ensuring a perfect fit for your car. With compact package dimensions of 1.524 H x 12.953 L x 9.398 W centimetres, it is easy to store and handle. Weighing just 0.2 pounds, this lightweight kit offers convenience during installation. Manufactured in the United States, you can trust the quality and reliability of this product, enhancing your vehicle's performance with ease.

The Honda Valve Shim Kit includes 47 pieces with a diameter of 9.48mm, featuring thicknesses ranging from 1.20mm to 3.50mm in 0.05mm increments. This variety allows you to find the perfect shim for your specific needs, ensuring optimal engine performance. Made from carburising steel, the shims are durable and reliable. Each shim is clearly marked with its size, making it easy for you to identify the right component quickly. This kit is suitable for various Honda and Yamaha models, providing excellent value for your maintenance needs.