Engines and Components› Connecting Rods and Components
ACL Race
Race Engine Bearing Kit
SKU: 5M1959H-STD, 4B1946H-STD, 1T1957 STD
Moderate — 2–4 hours
Description
The main bearings (Part # 5M1959H-STD) utilize a unique combination of design, metallurgy, and engineering for high-performance use. The rod bearings (Part # 4B1946H-STD) are manufactured to exacting tolerances for reliable fit and consistent clearances. The thrust washers (Part # 1T1957-STD) prevent crankshaft movement and help withstand stresses from clutch and flywheel operation.
Fitment
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Specifications
| Brand | ACL Race |
| Part Number | 5M1959H-STD, 4B1946H-STD, 1T1957 STD |
| Category | Engines and Components |
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Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.
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