If you’re serious about getting the most out of your engine, these ACL Race Series Engine Bearings are worth a look. They’re not just any bearings; they’re a solid blend of smart design, tough metallurgy, and precise engineering that really deliver when you push your ride to the limit. Made for those high RPM conditions, these bearings are perfect for popular 4, 6, and 8-cylinder setups.
What sets these bearings apart? For starters, the high-strength overlay plate is thinner, which means it can handle fatigue better. That’s crucial when you’re revving hard. Plus, they’ve got hardened steel backs on all the rod bearings, which gives extra support to the lining and helps keep everything in place. You don’t want to worry about your bearings shifting when you’re out on the track.
These bad boys also feature increased crush for better retention, so they stay put even when the going gets tough. They’ve eliminated flash plating on the backs, which enhances heat transfer. This means your engine runs cooler, and you get a solid grip between the bearings and housing. The increased eccentricity is a nice touch too, compensating for any bore distortion at high RPMs and helping to form those all-important hydrodynamic oil films.
The 3/4 grooved main bearings are designed to optimize load carrying surface area and ensure oil flows smoothly to the conrod bearings. Tight wall tolerances help maintain consistent clearances, which is a must for performance. And they’ve even enlarged the ID chamfers on the edges to fit those large fillet radii found on performance crankshafts.
Here are some specs to keep in mind: you can get these bearings in sizes like STD, .025, and .25. They come with standard oil clearance and identical halves, made from tri-metal hardened steel backs. The minimum standard shaft size is 1.7713 inches, and it maxes out at 1.7717 inches. For tunnel sizes, you’re looking at a minimum of 1.8898 inches and a maximum of 1.8907 inches. The max wall at the crown is 0.0587 inches, and the overall length is 0.6299 inches.
These bearings are a perfect fit for the Toyota Matrix from 2003 to 2014, specifically the 4B1856H-.25 ACL Toyota 4 1796cc 2ZZGE .25mm oversized performance rod bearing set. If you’re looking to upgrade your engine and push it to the max, these bearings are a solid choice.
Other Part Numbers:
ACL #acl4B1856H-.25
⚠ WARNING:
Cancer and Reproductive Harm
https://www.P65Warnings.ca.gov
| Make Vehicle | Model | Year |
|---|---|---|
|
2003-2014 Toyota Matrix |
Matrix | 2003-2014 |

ACL is a company that specializes in manufacturing and distributing high-quality engine bearings that have played a key role in the Australian automotive parts market.
Based in Launceston, Tasmania, Australia, the company has been in the business for more than 70 years and has become the leading brand when it comes to its market segment.
Throughout the years, ACL has consistently provided top quality products and has become the equipment supplier of multiple Automotive brands such as Lancia, Mazda, Mini, Mitsubishi, Nissan, Peugeot, Subaru, Toyota, Volvo, Suzuki, Renault, SAAB, and more. ACL also provides a replacement product range used by the aftermarket industry.
The company ensures that it maintains its high level of standard by employing manufacturing processes that are ISO certified. They also use the industry’s most advanced tooling equipment and designing software that allows them to create products that are superior in quality. ACL has been known worldwide to create bearings that are durable, innovative, and precise.
ACL also offers bearing used for high-performance applications. The company has been involved in motorsport racing since the 1960s and has manufactured bearings used in Brabham Formula 1. Today, their products are being used in different racing disciplines such as the Australian Supercar Championship, Drag racing, Driftings, and Rally.
Purchase ACL Bearings at Vivid RacingEngine Bearings are a critical component of a vehicle and should not be overlooked. If you want to make sure that what you get is something you could rely on, then ACL is the brand for you. With over 200 engine applications, whether it’s an American, Australian, European, or Asian made vehicle, ACL got you covered. Visit Vivid Racing and check out their list of bearings that would fit your specific needs.