-
files/ACL_Race_Series_main_bearing_set_for_BMW_N54_N55_S55B30.jpg
Upgrade your bottom end with ACL Race Series tri-metal main bearings, engineered for high-RPM performance and forced-induction reliability. Steel-backed with copper-lead-tin lining for improved fatigue strength and retention, increased crush for better retention, and enlarged ID chamfers to clear performance crankshaft fillets.
Fits: BMW N54B30, N55B30, S55B30 (3.0L Inline-6)
- Standard — stock, unworn crank journals
- Standard HX — same size as standard, +0.001" extra clearance, for built engines running higher oil temps/RPM
- 0.025mm Undersize — fine trim, minor crank cleanup
- 0.25mm Undersize — first regrind step
- 0.50mm Undersize — second regrind step
⚠️ Before ordering an undersize set, confirm your crank has been machined to the matching undersize spec — check clearances with Plastigauge before final assembly.
Upgrade your bottom end with ACL Race Series tri-metal main bearings, engineered for high-RPM performance and forced-induction reliability. Steel-backed with copper-lead-tin lining for improved fatigue strength and retention, increased crush for better retention, and enlarged ID chamfers to clear performance crankshaft fillets.
Fits: BMW N54B30, N55B30, S55B30 (3.0L Inline-6)
- Standard — stock, unworn crank journals
- Standard HX — same size as standard, +0.001" extra clearance, for built engines running higher oil temps/RPM
- 0.025mm Undersize — fine trim, minor crank cleanup
- 0.25mm Undersize — first regrind step
- 0.50mm Undersize — second regrind step
⚠️ Before ordering an undersize set, confirm your crank has been machined to the matching undersize spec — check clearances with Plastigauge before final assembly.
- Regular price
- $256.99
∼ Workshop Approved ∼ Your Build Deserves Better ∼ Trusted by Mechanics & Explorers ∼ Workshop Approved ∼ Your Build Deserves Better ∼ Trusted by Mechanics & Explorers ∼ Workshop Approved ∼ Your Build Deserves Better ∼ Trusted by Mechanics & Explorers ∼ Workshop Approved ∼ Your Build Deserves Better ∼ Trusted by Mechanics & Explorers ∼ Workshop Approved ∼ Your Build Deserves Better ∼ Trusted by Mechanics & Explorers ∼ Workshop Approved ∼ Your Build Deserves Better ∼ Trusted by Mechanics & Explorers ∼ Workshop Approved ∼ Your Build Deserves Better ∼ Trusted by Mechanics & Explorers ∼ Workshop Approved ∼ Your Build Deserves Better ∼ Trusted by Mechanics & Explorers ∼ Workshop Approved ∼ Your Build Deserves Better ∼ Trusted by Mechanics & Explorers ∼ Workshop Approved ∼ Your Build Deserves Better ∼ Trusted by Mechanics & Explorers ∼ Workshop Approved ∼ Your Build Deserves Better ∼ Trusted by Mechanics & Explorers ∼ Workshop Approved ∼ Your Build Deserves Better ∼ Trusted by Mechanics & Explorers ∼ Workshop Approved ∼ Your Build Deserves Better ∼ Trusted by Mechanics & Explorers ∼ Workshop Approved ∼ Your Build Deserves Better ∼ Trusted by Mechanics & Explorers ∼ Workshop Approved ∼ Your Build Deserves Better ∼ Trusted by Mechanics & Explorers ∼ Workshop Approved ∼ Your Build Deserves Better ∼ Trusted by Mechanics & Explorers ∼ Workshop Approved ∼ Your Build Deserves Better ∼ Trusted by Mechanics & Explorers ∼ Workshop Approved ∼ Your Build Deserves Better ∼ Trusted by Mechanics & Explorers ∼ Workshop Approved ∼ Your Build Deserves Better ∼ Trusted by Mechanics & Explorers ∼ Workshop Approved ∼ Your Build Deserves Better ∼ Trusted by Mechanics & Explorers
Frequently Bought Together
-
Vendor: ACL
ACL Race Series Rod Bearing Set - BMW N54/N55/S55B30
Regular price $170.00 -
Vendor: ACL
BMW S54 Rod Bearings 6B1569H
Sale price $120.00Regular price $139.99 -
Vendor: ACL
ACL Race Series Rod Bearing Set - BMW N54/N55/S55B30
Regular price $170.00 -
Vendor: ACL
BMW S54 Rod Bearings 6B1569H
Sale price $120.00Regular price $139.99
