ACL Race Series Engine Bearings - 4B1955-1.00

If you’re a Honda Prelude owner from 1983 to 2001 looking to push your engine’s performance to the next level, the ACL Race Series Engine Bearings (part number 4B1955-1.00) are engineered to meet your high-performance demands. These bearings are designed with the right balance of metallurgy and engineering, making them ideal for those who frequently operate at higher RPMs.

Why Choose ACL Race Series Engine Bearings?

The unique construction of these Trimetal engine bearings ensures they can handle the rigors of racing and spirited driving. Here’s what sets them apart:

• High-strength overlay plate with reduced thickness enhances fatigue resistance, allowing for longer-lasting performance.
• Hardened steel backs on all rod bearings provide superior support for the bearing lining, ensuring they stay securely in place.
• Increased crush improves bearing retention, minimizing the risk of bearing movement under heavy load.
• Flash plating has been eliminated from the back of the bearings to enhance heat transfer and grip between the bearings and their housing.
• Increased eccentricity compensates for bore distortion at high RPM, aiding in the formation of hydrodynamic oil films for better lubrication.
• 3/4 grooved main bearings optimize the load-carrying surface area and improve oil flow to the conrod bearings.
• Tight wall tolerances ensure consistent clearances, which is crucial for maintaining engine performance.
• Enlarged ID chamfers accommodate large fillet radii on performance crankshafts, ensuring a perfect fit.

Technical Specifications

• Size: STD, 025, .25
• Oil Clearance: Standard
• Half Type: Identical Halves
• Material: Tri-metal Hardened Steel Backs
• Min Standard Shaft Size: 1.7707in / 44.976 mm
• Max Standard Shaft Size: 1.7717in / 45 mm
• Min Standard Tunnel Size: 1.8898in / 48mm
• Max Standard Tunnel Size: 1.8898in / 48 mm
• Max Wall at Crown: 0.0591in / 1.502 mm
• Max Overall Length: 0.6890in / 17.5 mm

Fitment

These bearings are specifically designed for the Honda Prelude models from 1983 to 2001, ensuring a perfect fit and optimal performance. Whether you’re upgrading your engine for daily driving or preparing for the track, these bearings provide the reliability and strength your engine needs.

Customer Feedback

A 1997 Honda Prelude owner noted, “After installing the ACL Race Series bearings, I noticed an immediate improvement in oil pressure and engine response. They fit perfectly, and I feel confident pushing my engine harder without worrying about bearing failure.”