ACL Race Engine Bearings

Why Engine Builders Specify ACL

A bearing has to do two contradictory things — stay hard enough to carry load without deforming, and stay soft enough to embed the small debris that inevitably passes through an oil system. Balancing those is the entire craft, and it is where a purpose-built race bearing separates from a generic replacement.

ACL's Race Series uses a heavy-duty tri-metal construction with enlarged chamfers for high-lift crank fillets, and extra eccentricity to hold oil film at the crown where load is highest. Builders come back to it because it is proven under boost and sustained high rpm — the two conditions that find the limits of a standard bearing quickly.

The ACL Bearing Range

Our ACL catalogue covers the bearings and hardware that go into a bottom-end rebuild. Use our on-page filters to match your engine code, because bearing sizing is engine-specific and unforgiving.

Main Bearings: Crankshaft main bearing sets in standard and oversize grades, carrying the crank in the block and taking the brunt of combustion load.

Big End and Rod Bearings: Connecting rod bearing sets, the component that sees the highest cyclic loading in the engine and the first to complain about detonation or oil starvation.

Thrust Washers: Axial location for the crankshaft, controlling end float — critical on manual vehicles where clutch release pushes directly against the thrust face.

Oversize and Undersize Grades: Bearings in the graded sizes a machinist needs once a crank has been ground, so the rebuild works with the crank you have rather than the one you wish you had.

Alongside the ACL range, browse our wider selection of engine parts and engine oil for the rest of the rebuild.

Built for Rebuilds, Performance Builds and Race Engines

ACL is not a fitment-by-vehicle brand in the usual sense — bearings are selected by engine code and by the machining specification of the parts they are going into, not by the badge on the bonnet.

That said, the range is deep across the engines Australian builders actually work on: local V8 and six-cylinder platforms, Japanese four-cylinder and six-cylinder performance engines, and the turbocharged imports that dominate the modified scene.

Two things matter more than brand choice here. First, confirm your engine code and the exact bearing grade after the crank has been measured — never order to a nominal size. Second, check clearances on assembly with plastigauge or a bore gauge rather than assuming the box is correct for your build.

If you are unsure which grade your machinist has specified, ask before ordering. It is a five-minute conversation that prevents an expensive mistake.

Order ACL Engine Bearings Online Today

Ready to put the bottom end back together with bearings built for the load? Browse the full ACL range and enjoy fast, reliable shipping right across Australia. Free delivery kicks in on orders $99 and above, and our 30-day return policy covers you on unopened stock items. Order online today and get the build finished properly.

If you are assembling a full engine rather than replacing a set of shells, Superspares carries the rest of the job. Check out Permatex for gasket makers, thread sealants and assembly lubricants, Musashinok for head, rocker cover and sump gasket sets, or Nulon and Liqui Moly for the running-in and performance oils that protect fresh bearings.