ACL 5M909HX-STD Performance Race Series main bearing set for Chevrolet small-block engines. Tri-metal construction, 1/2 groove, and .001 in. extra clearance. Sold as a set of 5.
Product Details
- Brand: ACL Race Series Performance Engine Bearings
- Manufacturer's part number: 5M909HX-STD
- Part type: Main Bearings
- Product line: ACL Performance Race Series Main Bearing Sets
- Application: Chevrolet Small Block
- Bearing usage: Performance
- Engine crankshaft undersize (in.): 0.001 in.
- Engine crankshaft undersize (mm): 0.025mm
- Grooved bearing: Yes
- Groove location: Upper
- Groove style: 1/2
- Thrust bearing oversize: Stock
- Bearing material: Tri-metal, copper-lead alloy
- Quantity: Sold as a set of 5
- Notes: Fits engines with housing bores of 2.100 in.
Race Series Construction
Multi-layered tri-metal copper alloy construction combines high strength with seizure resistance. Precision manufacturing helps maintain consistent clearances. Design features include extended grooves, increased crush, bearing eccentricity, and enlarged inside-diameter chamfers.
Before Ordering
Confirm the part number, engine application, housing bore, journal dimensions, and required assembled clearance for your build. The supplied specifications above list both extra clearance and crankshaft undersize terminology; confirm the correct sizing with ACL before ordering. Extra oil clearance is not the same as a crankshaft undersize.