The ACL Race Series connecting rod bearing kit is specifically designed for racing and high-load street use. Its three-layer trimetal structure ensures exceptional heat resistance, excellent oil film formation, and reliable performance under extreme RPM conditions.
This kit is compatible with a wide range of Honda D-series engines, including the following:
Compatible Engines and Vehicle Models:
- Honda Civic II–VI: D15B2, D15B4, D15B7, D15Z1, D15Z2, D15Z6, D15Z8, D16A6, D16A7, D16Z2, D16Z6, D16Y1, D16Y4, D16Y5, D16Y7, D16Y8, D16B2
- Honda CRX II–III: D15B2, D15B6, D15B7, D16A6, D16A8, D16Y7, D16Y8, D16Z6
- Honda Concerto: D15B2, D16A8, D16A9, D16Z2
- Honda Integra: D16A1, D16A3, D16A8
- Honda HR-V: D16W1
- Honda Accord VI: D16B6
- Honda Domani: D16Z2
- Honda City: D15B7
- Honda Torneo: D16B6
Note: This bearing set covers the D15B, D15Z, D16A, D16B, D16W, D16Y, and D16Z engine families, making it a perfect fit for any Honda equipped with these engines.
Part Numbers and Sizes Available:
- 4B1956H – STD (Standard Size)
- 4B1956HX – STD +0.001" (+0.0254 mm) High Clearance
- 4B1956H0.025 – 0.025 mm Oversize
- 4B1956H0.25 – 0.25 mm Oversize
The HX version provides extra oil clearance, which is especially recommended for high-RPM or performance engines where crankshaft flex and heat expansion require more oil film.
Specifications:
- Tunnel diameter: 48.000 – 48.020 mm
- Shaft diameter: 44.980 – 45.000 mm
- Wall thickness: max. 1.486 mm (HX: 1.499 mm)
- Length: 18.5 mm
- Bearing type: Identical halves
- HX extra clearance: +0.001” = +0.0254 mm
- Weight: 0.14–0.15 kg
Key Features:
- Race-engineered – stable under high RPM and heavy load
- Trimetal construction – excellent heat dissipation and oil film creation
- Hardened steel backing – improved crush retention and stability
- Increased eccentricity – compensates for bore distortion at high RPM
- HX version provides extra oil clearance – better lubrication and less wear
- 3/4 grooved main bearings – optimized oil flow
