ACL SR20DE/DET CT-1 Main Bearings, 0.25mm Undersize | 5M2964HC-.25
ACL SR20DE/DET CT-1 Coated Main Bearing Set, 0.25mm Undersize | 5M2964HC-.25
The ACL 5M2964HC-.25 Race Series main bearing set combines ACL performance bearing construction with Calico CT-1 dry-film lubricant coating for compatible Nissan SR20DE and SR20DET 2.0L engines, excluding GTiR applications. This is the 0.25mm undersize-journal size, intended for an appropriately machined crankshaft rather than standard-size journals. Ships fast across Canada and the US.
Product Details
- Brand: ACL.
- Manufacturer part number: 5M2964HC-.25.
- Series: Race Series, Calico-coated HC configuration.
- Bearing location: crankshaft main journals.
- Engine application: Nissan SR20DE/DET, 2.0L inline-four, non-GTiR.
- Size: 0.25mm undersize-journal specification.
- Coating: Calico CT-1 dry-film lubricant.
- Package: main bearing set.
CT-1 Coating
Calico CT-1 is a dry-film lubricant coating designed to help reduce friction and abrasive wear and provide intermittent dry lubrication. It supplements the bearing's lubricated operating surface; it does not replace engine oil, correct unsuitable machining or eliminate the need to establish the correct assembled clearances.
Fitment and Package Notes
ACL's coated-bearing application guide lists 5M2964HC for SR20DE/DET engines excluding GTiR. Match the engine and crankshaft configuration directly rather than assuming fitment from a vehicle model, especially on swapped or previously rebuilt engines.
This is a main bearing set, not a connecting-rod bearing set or complete engine bearing package. ACL lists the thrustwasher separately as 1T2964C; do not assume a separate thrustwasher set is included.
Assembly Requirements
Have a qualified engine builder measure every journal and the main bearing housings, then verify assembled oil clearance with the coated bearings installed. Check crankshaft condition, housing alignment and oil passage cleanliness, and follow ACL's current installation guidance and the engine's fastening procedure.
No universal clearance target, horsepower rating or guaranteed engine-life improvement is claimed. Do not remove or alter the coating without the bearing manufacturer's direction.
Ships fast across Canada and the US.