Please see bottom of listing for all compatible models

Please note: We generally keep these bearings in stock, but if they are not on the shelf at Group D, these will incur a one week delivery time.

The unique combination of design, metallurgy and engineering come together to deliver what drivers expect from high performance Trimetal engine bearings.

Designed to withstand higher RPM conditions, ACL Race Series Engine Bearings are available for many of the popular 4, 6 & 8 cylinder applications and feature:

High strength overlay plate with reduced thickness for improved fatigue properties
Hardened steel backs on all rod bearings to improve the support of the bearing lining and assist with bearing retention in the housing.
Increased crush for improved bearing retention
Elimination of flash plating on the back of the bearings to improve heat transfer through the bearings and to maximize the grip between the bearings and its housing.
Increased eccentricity to compensate for bore distortion at high rpm and to assist in the formation of hydrodynamic oil films.
3/4 grooved Main Bearings to optimize bearing load carrying surface area and oil flow to the conrod bearings.
Tight consistent wall tolerances to help you maintain consistent clearances.
Enlarged ID chamfers on bearing edges where required to accommodate large fillet radius on performance crankshafts.

- Specs:
- Tunnel [mm]
  
  53.600 / 53.616
- Shaft [mm]
  
  49.973 / 49.993
- Max. Wall
  
  1.793
- Max. Length
  
  17.55
- Half type
  
  Upper & lower
- Weight [KG]:
  
  0.26

Make	Model	Engine	Variant
BMW	1 (F20)	N55B30A	M 135 i
BMW	1 (F20)	N55B30A	M 135 i xDrive
BMW	1 (F20)	N55B30A	M 135 i
BMW	1 (F20)	N55B30A	M 135 i xDrive
BMW	1 (F21)	N55B30A	M 135 i
BMW	1 (F21)	N55B30A	M 135 i xDrive
BMW	1 (F21)	N55B30A	M 135 i
BMW	1 (F21)	N55B30A	M 135 i xDrive
BMW	1 Convertible (E88)	N54B30A	135 i
BMW	1 Convertible (E88)	N55B30A	135 i
BMW	1 coupe (E82)	N54B30A	135 i
BMW	1 coupe (E82)	N55B30A	135 i
BMW	1 coupe (E82)	N54B30A	M
BMW	2 Convertible (F23)	N55B30A	M 235 i
BMW	2 Convertible (F23)	N55B30A	M 235 i xDrive
BMW	2 coupe (F22, F87)	N55B30A	M 235 i
BMW	2 coupe (F22, F87)	N55B30A	M 235 i xDrive
BMW	2 coupe (F22, F87)	N55B30A	M2
BMW	2 coupe (F22, F87)	S55B30A	M2 Competition
BMW	2 coupe (F22, F87)	S55B30A	M2 CS
BMW	3 (E90)	N54B30A	335 xi
BMW	3 (E90)	N54B30A	335 i
BMW	3 (E90)	N55B30A	335 i
BMW	3 (E90)	N54B30A	335 xi
BMW	3 (E90)	N54B30A	335 i xDrive
BMW	3 (E90)	N55B30A	335 i xDrive
BMW	3 (F30, F80)	N55B30A	335 i
BMW	3 (F30, F80)	N55B30A	335 i
BMW	3 (F30, F80)	N55B30A	335 i xDrive
BMW	3 (F30, F80)	N55B30A	335 i xDrive
BMW	3 (F30, F80)	N55B30A	ActiveHybrid
BMW	3 (F30, F80)	N55B30A	335 i
BMW	3 (F30, F80)	N55B30A	335 i xDrive
BMW	3 (F30, F80)	S55B30A	M3
BMW	3 (F30, F80)	S55B30A	M3 Competition
BMW	3 (F30, F80)	S55B30A	M3 CS
BMW	3 Convertible (E93)	N54B30A	335 i
BMW	3 Convertible (E93)	N55B30A	335 i
BMW	3 Gran Turismo (F34)	N55B30A	335 i
BMW	3 Gran Turismo (F34)	N55B30A	335 i xDrive
BMW	3 Gran Turismo (F34)	N55B30A	335 i
BMW	3 Gran Turismo (F34)	N55B30A	335 i xDrive
BMW	3 Gran Turismo (F34)	N55B30A	335 i
BMW	3 Gran Turismo (F34)	N55B30A	335 i xDrive
BMW	3 Touring (E91)	N54B30A	335 i
BMW	3 Touring (E91)	N55B30A	335 i
BMW	3 Touring (E91)	N54B30A	335 xi
BMW	3 Touring (E91)	N55B30A	335 xi
BMW	3 Touring (E91)	N54B30A	335 i xDrive
BMW	3 Touring (E91)	N55B30A	335 i xDrive
BMW	3 Touring (F31)	N55B30A	335 i
BMW	3 Touring (F31)	N55B30A	335 i xDrive
BMW	3 Touring (F31)	N55B30A	335 i
BMW	3 Touring (F31)	N55B30A	335 i xDrive
BMW	3 coupe (E92)	N54B30A	335 i
BMW	3 coupe (E92)	N55B30A	335 i
BMW	3 coupe (E92)	N54B30A	335 xi
BMW	3 coupe (E92)	N55B30A	335 xi
BMW	3 coupe (E92)	N55B30A	335 i xDrive
BMW	3 coupe (E92)	N54B30A	335 i xDrive
BMW	3 coupe (E92)	N54B30A	335 i xDrive
BMW	4 Convertible (F33, F83)	N55B30A	435 i
BMW	4 Convertible (F33, F83)	S55B30A	M4
BMW	4 Convertible (F33, F83)	N55B30A	435 i xDrive
BMW	4 Convertible (F33, F83)	S55B30A	M4 Competition
BMW	4 Gran Coupe (F36)	N55B30A	435 i
BMW	4 Gran Coupe (F36)	N55B30A	435 i xDrive
BMW	4 coupe (F32, F82)	N55B30A	435 i
BMW	4 coupe (F32, F82)	N55B30A	435 i xDrive
BMW	4 coupe (F32, F82)	S55B30A	M4
BMW	4 coupe (F32, F82)	S55B30A	M4 Competition
BMW	4 coupe (F32, F82)	S55B30A	M4 GTS
BMW	4 coupe (F32, F82)	S55B30A	M4 CS
BMW	5 (F10)	N55B30A	535 i
BMW	5 (F10)	N55B30A	535 i xDrive
BMW	5 (F10)	N55B30A	ActiveHybrid
BMW	5 (F10)	N55B30A	535 i
BMW	5 (F10)	N55B30A	535 i xDrive
BMW	5 Gran Turismo (F07)	N55B30A	535 i
BMW	5 Gran Turismo (F07)	N55B30A	535 i xDrive
BMW	5 Touring (F11)	N55B30A	535 i
BMW	5 Touring (F11)	N55B30A	535 i xDrive
BMW	5 Touring (F11)	N55B30A	535 i
BMW	5 Touring (F11)	N55B30A	535 i xDrive
BMW	6 Convertible (F12)	N55B30A	640 i
BMW	6 Convertible (F12)	N55B30A	640 i xDrive
BMW	6 Gran Coupe (F06)	N55B30A	640 i
BMW	6 Gran Coupe (F06)	N55B30A	640 i xDrive
BMW	6 coupe (F13)	N55B30A	640 i
BMW	6 coupe (F13)	N55B30A	640 i xDrive
BMW	7 (F01, F02, F03, F04)	N54B30A	740 i, Li
BMW	7 (F01, F02, F03, F04)	N55B30A	740 i, Li
BMW	7 (F01, F02, F03, F04)	N55B30A	740 i, Li xDrive
BMW	7 (F01, F02, F03, F04)	N55B30A	ActiveHybrid 7
BMW	All	N54B30	All
BMW	All	N55B30	All
BMW	M3 F80	S55B30	All
BMW	M4 F82	S55B30	All
BMW	M4 F83	S55B30	All
BMW	X3 (F25)	N55B30A	xDrive 35 i
BMW	X4 (F26)	N55B30A	xDrive 35 i
BMW	X4 (F26)	N55B30A	M 40 i
BMW	X5 (E70)	N55B30A	xDrive 35 i
BMW	X5 (E70)	N55B30A	xDrive 35 i
BMW	X5 (E70)	N55B30A	xDrive 40 i
BMW	X5 (F15, F85)	N55B30A	xDrive 35 i
BMW	X6 (E71, E72)	N54B30A	xDrive 35 i
BMW	X6 (E71, E72)	N54B30A	xDrive 35 i
BMW	X6 (E71, E72)	N55B30A	xDrive 35 i
BMW	X6 (E71, E72)	N55B30A	xDrive 35 i
BMW	X6 (F16, F86)	N55B30A	xDrive 35 i
BMW	Z4 Roadster (E89)	N54B30A	sDrive 35 i
BMW	Z4 Roadster (E89)	N54B30A	sDrive 35 is

N55

Supertech Valve Spring Kit BMW N54/N55/S55

ACL Race Bearing Set - CONRODS BMW N54/N55/S55

ACL Race Bearing Set - MAINS BMW N54/N55 S55 Std.