KIA OPTIMA Bearings & Bearing Spacers Engines & Components

King SM-Series Rod Bearings

For high load applications, King SM-Series rod bearings contain the strongest aluminum-based material offered by King. The alloy is strengthened by the addition of manganese and chromium. King SM-Series connecting rod bearings feature a traditional steel-backing, plus an aluminum bonding layer and the aluminum bearing alloy. These replacement sets are available for a variety of vehicle applications.

5.0 out of 5 stars ( 1 )

$20.50

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$43.99

King SI-Series Main Bearings

King SI-Series main bearings are recommended for OE applications. These replacement bearings are designed for aftermarket gasoline or diesel engine rebuilding—and performance engines with factory crankshafts. The bearings have an improved crankshaft finish for reducing microscopic ferrite peaks on improperly ground or polished nodular cast iron crankshafts. King SI-Series main bearings feature improved oil clearance to reduce wear and increase engine life, which in turn reduces operating noise, vibration, and excess oil flow. Order the bearing set designed for fitment on your make and model.

4.0 out of 5 stars ( 90 )

$12.50

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$66.99

Enginetech Rod Bearings

Enginetech rod bearings are made of high-quality alloys, based on the application requirement. They are made on state of the art equipment, ensuring consistent bearing thickness for proper oil clearances, and parting line chamfers are precisely controlled, ensuring they are cut at the correct angle to allow for the proper amount of oil bleed-through without reducing oil pressure. The materials are high strength (load capacity), but also have good anti-friction properties (wear resistance, anti-seizure, and embeddability). Enginetech rod bearings provide extra protection and better durability within your rebuild. Select the size needed.

Not Yet Reviewed

$25.99

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$61.99

King XP-Series Rod Bearings

King XP-Series rod bearings feature advanced metallurgical and geometric technologies that meet extreme performance loads. They were developed for all performance applications that use forged steel aftermarket crankshafts and produce high loads for extended periods. King focuses on one product—bearings—and nothing else. Their innovative race-only Xtreme Performance Max Black Tri-Metal rod bearings have a 24 percent stronger overlay and 17 percent more fatigue strength by using a micro process called SecureBond. Built with enhanced tri-metal, King XP-Series rod bearings layer copper-lead construction with a nickel plate barrier and a lead/tin/copper Babbitt overlay over a steel backing in an adhesion process that provides superior stability and durability. King's advanced control measures hit a bull's-eye, maintaining wall thickness tolerances far tighter than their competitors—at an amazing +/- .0001 in.! XP-Series rod bearings are narrowed on the crank cheek side with increased crush height for improved bearing-to-bore contact, heat transfer, and reduced spin potential in high-rpm applications.

4.53 out of 5 stars ( 73 )

$90.99

ACL Direct Replacement Rod Bearing Sets

ACL direct replacement rod bearing sets are affordable, high-quality bearings expertly made from premium materials and engineered to match your exact requirements. They are offered in the Aluglide and Duraglide Series of bearings in numerous sizes, including standard, and covering a vast range of automotive gas engines, as well as diesel applications. Select the set desired for your build. ACL Aluglide bi-metal bearings are designed with a proprietary composition of aluminum, tin, and silicon combined with a steel backing to provide exceptional wear resistance, outstanding strength, and excellent load-carrying characteristics. ACL Duraglide bearings feature a tri-metal (copper/lead/alloy) design that provides a combination of high strength and the ability to withstand harsh/demanding operating conditions above casual driving, making them ideal for performance engines and rebuilds.

3.0 out of 5 stars ( 1 )

$12.99

Clearance

King XP-Series Main Bearings

Built with enhanced tri-metal, King XP-Series main bearings have a layered copper lead construction, with a nickel plate barrier and lead/tin/copper Babbitt overlay over a steel backing--in an adhesion process that provides superior stability and durability. King's advanced control measures hit a bull's-eye, maintaining wall thickness tolerances far tighter than their competitors: an amazing +/- .0001 in. The XP-Series main bearings are narrowed for large radii crankshafts and feature enlarged, chamfered oil holes with full, 3/4 in., or 1/2 in. grooving for improved oiling. They deliver consistent and reliable performance with a high-load capacity. These race-only Xtreme Performance (XP-Series) Tri-Lecular main bearings are proven track-tough to handle the ground-shaking power of your race engine. Hundreds of sets are available; order the bearings recommended for your vehicle.

4.47 out of 5 stars ( 47 )

$105.99

$62.50

Enginetech Engine Crankshaft Thrust Washers

Enginetech offers engine crankshaft thrust washers for a wide range of applications. These precision-engineered, wearable components are designed to control crankshaft end-float (axial forward/backward movement) in engines. They protect expensive crankshafts and engine blocks from damage by providing a dedicated wear surface, meeting or exceeding OE specifications. Order the washers recommended for your vehicle. Key features and functions: * Prevent damage: These washers take the wear, preventing the crankshaft counterweights from striking the cylinder block, which can cause catastrophic engine failure * Control end-float: They manage the forward/backward movement caused by clutch operation in manual vehicles or torque converter loads in automatics * Maintain alignment: They ensure the crankshaft remains in the correct position for proper connecting rod alignment, preventing binding, jamming, or uneven piston wear * Material quality: Often manufactured from durable, high-quality bronze or bimetallic materials that can handle high-load, high-friction scenarios * Using Enginetech thrust washers ensures precise clearances, which is crucial for oil pressure retention and preventing crankshaft "walking"

Not Yet Reviewed

$13.99

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$20.99

Enginetech Main Bearings

Enginetech main bearings are made of high-quality alloys, based on the application requirement. Manufactured on state-of-the-art equipment, this ensures consistent bearing thickness for proper oil clearances, and parting line chamfers are precisely controlled, guaranteeing they are cut at the correct angle to allow for the proper amount of oil bleed-through without reducing oil pressure. Thrust washers are included, where appropriate, when they are not already molded into the main bearing. The materials are high strength (load capacity), but also have good anti-friction properties (wear resistance, anti-seizure, and embeddability). Enginetech main bearings provide extra protection and better durability within your rebuild. Select the size needed.

Not Yet Reviewed

$33.99

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$58.99

King SM-Series Main Bearings

For high load and performance applications, King SM-Series main bearings are the strongest aluminum-based material offered by King. The alloy is strengthened by the addition of manganese and chromium. SM-Series crankshaft main bearings feature a traditional steel-backing, aluminum bonding layer, and the aluminum bearing alloy. They are available for a wide variety of vehicle and engine applications.

Not Yet Reviewed

$29.99