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ACL Bearings 5M1538H-STD Race Series Tri-Metal Main Bearings

Manufacturer

Picture for manufacturer ACL Bearings

Part Number

5M1538H-STD
18 reviews
Sale Price

$233.06

Estimated ship date Saturday, November 28

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No Hassle Returns

No Hassle Returns

Live-in-stock inventory

Live-in-stock inventory

Fitment guaranteed

Fitment guaranteed

Product Details

ACL Race Series Main Bearings are engineered for high-performance and racing applications where extreme RPM and cylinder pressures demand superior durability. These tri-metal bearings feature upper and lower bearing halves designed to deliver maximum reliability under the most demanding conditions.

Key Features:

  • High-strength overlay plate with reduced thickness for improved fatigue resistance and longevity
  • Hardened steel backing provides enhanced support for the bearing lining and improved retention in the housing
  • Increased crush ensures superior bearing retention and stability
  • Elimination of flash plating on bearing backs maximizes heat transfer and improves grip between bearing and housing
  • Increased eccentricity compensates for bore distortion at high RPM and promotes hydrodynamic oil film formation
  • 3/4 groove design optimizes load-carrying surface area while maintaining proper oil flow to connecting rod bearings
  • Tight, consistent wall tolerances enable precise clearance control for optimal performance
  • Enlarged ID chamfers accommodate large fillet radii found on performance crankshafts

ACL's unique combination of advanced metallurgy, precision engineering, and race-proven design makes these tri-metal main bearings the choice of professional engine builders and performance enthusiasts worldwide.

Products specifications

Max Overall Length

0.787" (20.00mm) #1,2,4,5 0.982" (24.94mm) #3 thrust

Max Std Shaft Size

2.3618" (59.990mm)

Max Std Tunnel Size

2.5598" (65.019mm)

Max Wall at Crown

0.0980" (2.490mm)

Min Std Shaft Size

2.3611" (59.971mm)

Min Std Tunnel Size

2.5591" (65.000mm)

Oil Clearance

Standard

Size

Standard

Excellent service good price and good attention excellent products

Good

It was a great fit and easy to put on. Delivery was on time. Would buy again.

Great fast service

Good product, received in time.

Great

Out of all the websites I've used to find my item, this was the lowest cost, and I'm so happy that I found them! Keep up the great work guys!

great site

good prices

So far found what I've been looking for so I'm satisfied currently

Don't know if it accepted the coupon code but shopping was easy.

Recommended by a fellow RegalGS member. Cheaper than Amazon. I haven't had the opportunity to put them on yet, but everything looks good.

I HONESTLY thought it was too good to be true! Almost 100$$$ less than any other place, I took a chance and ordered my ready lift leveling kit and it was here within 3 days! I received an email instantly with a tracking number, and was followe up with an email once it was delivered. EXTREMELY HAPPY! Thank you Autoplicity!

Easy to order and a great price - look forward to receiving my parts!

better price than anyone on eBay, and in stock and shipped immediately, paid one day had it the third day

Very quick and painless. I love that you accept Amazon payments.

Excellent so far!

I did a pretty extensive search looking for a good price on a specific set of Autogage gauges. They had the best price and were in stock with quick notification of shipment. Order # 27510 should be here soon so I can finish my project. Would so business with again.

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