ACL Race Series Engine Bearings - 4B1630HX-STD

When it comes to maximizing the performance of your Nissan, the ACL Race Series Engine Bearings (4B1630HX-STD) are engineered to deliver the durability and reliability you need for high RPM conditions. These tri-metal bearings are designed specifically for enthusiasts who demand precision and performance from their engines, making them an essential upgrade for Nissan models like the 200SX S12 (1985-1988), Pulsar (1987-2005), and Sentra (1982-2018).

Features

• High-strength overlay plate with reduced thickness enhances fatigue resistance, ensuring longevity under stress.
• Hardened steel backs on all rod bearings provide superior support for the bearing lining and enhance retention in the housing.
• Increased crush improves bearing retention, preventing movement during extreme conditions.
• Elimination of flash plating on the back of the bearings improves heat transfer, maximizing grip between bearings and housing.
• Increased eccentricity compensates for bore distortion at high RPM, aiding in the formation of hydrodynamic oil films.
• 3/4 grooved main bearings optimize load-carrying surface area and oil flow to conrod bearings, enhancing lubrication.
• Tight, consistent wall tolerances help maintain proper clearances for optimal engine performance.
• Enlarged ID chamfers accommodate large fillet radius on performance crankshafts, ensuring a perfect fit.

Technical Specifications

• Size: STD
• Oil Clearance: +0.001" Extra
• Half Type: Identical Halves
• Material: Tri-metal Hardened Steel Backs
• Min Standard Shaft Size: 1.7701 in / 44.961 mm
• Max Standard Shaft Size: 1.7701 in / 44.961 mm
• Min Standard Tunnel Size: 1.8898 in / 48 mm
• Max Standard Tunnel Size: 1.8903 in / 48.013 mm
• Max Wall at Crown: 0.0587 in / 1.492 mm
• Max Overall Length: 0.7323 in / 18.6 mm

Fitment

• Nissan 200SX S12 (1985-1988)
• Nissan Pulsar (1987-2005)
• Nissan Sentra (1982-2018)

Customer Feedback

One Nissan Sentra owner remarked, "After installing the ACL Race Bearings, I noticed a significant improvement in my engine's response at higher RPMs. The fit was perfect, and I feel much more confident pushing my car on the track." Another Nissan Pulsar driver shared, "These bearings held up flawlessly during my last race. They kept my oil temps down and provided solid performance throughout the event."

Upgrade your Nissan's engine with the ACL Race Series Engine Bearings (4B1630HX-STD) and experience the difference in performance and reliability. Whether you're hitting the track or simply enjoying spirited drives, these bearings are built to meet the demands of serious drivers.