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ACL Bearings 4B2976H-.25 Race Series Rod Bearing Set for Nissan SR20DET GTiR 0.25mm Oversize

Manufacturer

Picture for manufacturer ACL Bearings

Part Number

4B2976H-.25
6 reviews
Sale Price

$46.33

Estimated ship date Saturday, December 05

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Product Details

The ACL Race Series connecting rod bearing set is engineered for high-performance Nissan SR20DET GTiR 2.0L inline-4 engines operating under extreme conditions. This 0.25mm oversize bearing set features advanced metallurgy and precision manufacturing designed to withstand high RPM, elevated stress loads, and extreme temperatures in racing and performance applications.

Race-Proven Engineering Features:

  • Tri-layer construction with hardened steel backing for superior strength and crush resistance under high loads
  • High-strength overlay plate with reduced thickness for improved fatigue properties and durability
  • Enhanced heat transfer design with optimized back surface for maximum heat dissipation
  • Increased eccentricity to compensate for bore distortion at high RPM and promote hydrodynamic oil film formation
  • Large chamfer radius to accommodate larger crankshaft fillets common in performance builds
  • Tight, consistent wall tolerances to maintain precise oil clearances throughout the bearing life

Technical Specifications:

  • Application: Nissan SR20DET GTiR (19mm wide bearing)
  • Bearing Size: 0.25mm oversize
  • Bearing Half Type: Identical halves
  • Bearing Material: F781 tri-metal alloy
  • Max Shaft Size: 47.974mm (1.889")
  • Max Tunnel Size: 51.013mm (2.008")
  • Overall Length: 19.1mm (0.752")
  • Wall Thickness at Crown: 1.503mm (0.059")

ACL Race Series bearings are manufactured to exacting tolerances with particular attention to wall thickness accuracy, ensuring reliable fitment and consistent oil clearances. The 0.25mm oversize dimension is designed for use with crankshafts that have been machined undersize or require increased bearing thickness for proper clearance specifications.

Products specifications

Size

.25

They had the lowest price by far! Quick shipment! I am going back for more. Thanks!<br><br>Order 6489

Excellent service. Fast delivery.

AWesome service. questions answered immediately via chat and order was en route via fed ex within 6 hours!!!!!!

Best price I could find on the Internet can't go wrong with saving money

Finally I found the part I have searched all over for. Thank you autoplicity for having such a specialized part. Great customer service too. Very easy to use web site as well.

I purchased a wiring connector and some additional wiring pins. Super fast shipping. Likely to buy from again.

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