ACL Race Series Main Bearings
A unique combination of design, metallurgy, and engineering delivers what drivers expect from high-performance Trimetal engine bearings.
Features
- Designed to withstand higher RPM conditions.
- High-strength overlay plate with reduced thickness for improved fatigue properties.
- Hardened steel backs on all connecting rod bearings to improve bearing lining support and assist with bearing retention in the housing.
- Increased crush for improved bearing retention.
- Elimination of flash plating on the bearing backs to improve heat transfer through the bearing sands and maximize grip between the bearing and housing.
- Increased eccentricity to compensate for bore distortion at high RPM and to assist in the formation of a hydrodynamic oil film.
- 3/4 grooved main bearings to optimize bearing load-carrying surface area and oil flow to the connecting rod bearings.
- Tight and consistent wall tolerances to maintain consistent clearances.
- Enlarged ID chamfer on bearing edges necessary to accommodate large fillet radii on performance crankshafts.
Applications
- Subaru EJ series engines with #5 thrust bearing
- 2002–2014 WRX
- 2004–2021 STI
- 1992–2017 Impreza
- 1989–2020 Legacy
What's in the box?
- (1) Complete set of main bearings
Warranty
- Standard manufacturer's warranty
Before Ordering
〇 Regarding Import Consumption Tax
At Shaft-ya shopping site, we pay the import consumption tax incurred at the time of import on your behalf, so there will be no additional charges beyond the total amount paid at checkout.
〇 Confirmation of Compatibility
Our entire product database is based on North American vehicles (USDM), so please confirm whether the product can be installed on a Japanese vehicle (JDM) before ordering. (If you are unsure if the listed product is compatible with your vehicle, please feel free to contact us. Our support team will investigate for you.)
If you order without confirming compatibility, we cannot accept returns due to incompatibility.
Please note that even if you sort products by selecting the year, manufacturer, and vehicle model in the tabs on our top page, this does not necessarily mean they will fit Japanese model vehicles without modification.
All products have been translated into Japanese using translation software. As there may be confusing expressions, please contact us before ordering if you have any questions.
○ Regarding Shipping
Shipping costs are paid at the time of checkout. For shipping cost estimates, they are calculated automatically when you enter your shipping address on the checkout page. For large items such as body parts, the automatically calculated shipping cost may occasionally differ significantly from the actual cost. In such cases, we will contact you individually by email.
All products are generally shipped internationally from our US warehouse. Unlike domestic shipping in Japan, international shipping takes about 7 to 14 days, so please order with time to spare. If you are in a hurry, please contact us in advance to confirm the delivery date. Note that all products are transported by air. They are never shipped by sea freight.
○ Regarding Japanese Vehicle Inspection (Shaken) Compatibility
The products we handle are basically all designed and manufactured outside of Japan. Please note that they are not compliant with the "Japanese Vehicle Inspection System," and we cannot provide documents such as strength calculation reports for the Japanese vehicle inspection system. Therefore, all parts are sold for the purpose of "use on circuits, private property, or off-road," so please install and use them at your own risk.
○ Regarding Warranty
Please check the contents immediately upon arrival. Since all products are shipped internationally from outside Japan, there may be delivery damage to the packing boxes or the products themselves. Please understand that for products with delivery damage, defective products, or products different from what was ordered, we will only handle returns, refunds, or replacement exchanges if you contact us within 7 days of receipt. Furthermore, for products sold through us, we will handle warranty-related issues "only through us." Please note that we do not handle support through other companies or distributors located within Japan.