Tri-metal main bearings VAG 2.8/2.9 12V/24V VR6 R32 AAA ABV AQP AUE BDE BHE BFH BML BUB CBRA

The tri-metal main bearing sets ACL RACE and KING RACING for VR6 and R32 engines consist of 14 bearing shells.

Below (click on the image) you will find the tri-metal big end bearings for VR6 and R32 engines:

Technical specification

• Crankshaft main journal diameter (min/max): 59.958 / 59.978mm
• Main bearing bore (min/max): 65.000 / 65.010mm
• Max thickness: 2.501mm
• Sizes: standard, standard with HX clearance, +0.025 or +0.25mm
• Anti-friction coating: none
• References: 7M5532, 7M5532H-STD, 7M5532HX-STD, 7M5532H-.025, 7M5532H-.25

ACL Race Series tri-metal bearings are manufactured to tight tolerances. CNC machining works to the micron, before metrological inspection of the diameters, the thickness and the width of the ACL Race Series tri-metal shell. ACL Race Series bearings therefore give a reliable and consistent fit in your performance engine. ACL Race Series tri-metal bearings are in fact built up from 4 layers:

• SAE1010 steel on the outside
• 0.3mm copper alloy
• 0.0001mm nickel
• 0.013 to 0.018mm copper alloy

This choice of materials, together with the manufacturing process, makes ACL Race Series tri-metal bearings more resistant to increases in power, torque and engine speed. The compressive strength of ACL Race Series tri-metal bearings brings reliability to your engine even on heavily boosted turbo or supercharged builds, or on high revving race engines.

Technical specification

• Crankshaft journal diameter (min/max): 59.98 / 59.96mm
• Main bearing bore (min/max): 65.00 / 65.01mm
• Max thickness: 2.502mm
• Sizes: standard, standard with HX clearance, +0.026, +0.25mm or +0.50mm
• Anti-friction coating: none
• References: MB7089, MB7089XP, MB7089XP STDX, MB7089XP.026, MB7089XP0.25, MB7089XP0.5

KING RACING has been designing and manufacturing high performance, high quality bearings since 1960. Beyond its high performance production machinery, King Racing relies on simulation software to analyse the thermodynamics, the dynamics and the elasto-hydrodynamics of its bearings. KING RACING tri-metal bearings are produced in pMax Black, a tri-metal alloy 24% stronger than any existing tri-metal bearing.

KING RACING bearings are built up from 3 to 4 layers, depending on the application:

Outer layer: steel Intermediate layer: lead bronze Inner layer: babbitt with a high copper content Anti-friction coating with lubricant and ceramic additives