ACL connecting-rod bearing set — manufacturer catalog product photo
Click to zoom in

ACL BMW N54/N55/S55B30 3.0L Inline 6 Race Series High Performance Rod Bearing Set

$ 358.08
$ 358.08

ACL 6B1584HX-STD is a connecting-rod bearing set for the cataloged BMW N54B30, N55B30, S55B30 engine configurations. STD manufacturer size designation; verify the exact engine and assembled clearance.

Bearing Configuration

HX specifies 0.001 inch (0.025 mm) additional oil clearance relative to the corresponding H-STD set on the specified standard-size shaft. It is separate from any repair-size or housing-oversize designation.

Engine Application

Manufacturer / Engine BMW — N54B30
Manufacturer / Engine BMW — N55B30
Manufacturer / Engine BMW — S55B30

The engine-family list identifies catalog applications, not universal vehicle fitment. Confirm the exact engine version, crankshaft, rods, block and bearing location. Vehicle names and photos do not replace dimensional verification.

Specifications

Brand ACL
Manufacturer Part Number 6B1584HX-STD
Component Connecting-Rod Bearing Set
Size Selection STD manufacturer size designation; verify the exact engine and assembled clearance.
Catalog Family ACL Race Series
Half Type Upper & lower
Catalog Size Options STD

Quantity and Assembly Checks

Confirm the set contents, bearing positions and any separate thrust components against the complete manufacturer number. The photo is representative of the part family.

Measure shaft journals, housing bores and assembled oil clearance using the engine builder’s specification. Check oil-hole alignment, groove placement and crankshaft fillet clearance before final assembly. Catalog standard dimensions must not be treated as the finished dimensions for a different repair size.

Frequently Asked Questions

Is the year and model enough to choose this bearing? No. Match 6B1584HX-STD to the exact engine and measured build specification.

What size is this listing? STD manufacturer size designation; verify the exact engine and assembled clearance.

Can I substitute a different suffix? Compare the complete grade, size, locating features and assembled clearance before substituting any bearing.

Related Engine Parts

Shop ACL engine components, engine bearings and oil pumps.

ACL Performance Parts

ACL Performance Parts

Shop ACL engine bearings, Race Series rod and main bearings, thrust washers, and selected oil pumps at Black Ops Auto Works. Compare the complete manufacturer part number, engine application, bearing position, and size designation before choosing parts for a rebuild. Standard-size, extra-clearance, and repair-size bearings serve different measured requirements and are not interchangeable simply because the engine family matches. ACL Rod Bearings, Main Bearings, and Thrust Components Connecting-rod bearings support the crankshaft rod journals. Main bearings support the crankshaft in the block, while thrust faces or separate thrust washers control axial movement. The correct set depends on the engine version, journal dimensions, housing bore, and thrust arrangement. Some applications use individual bearing pairs or selective grades rather than one complete engine set. Check the stated package quantity and full suffix before ordering. What Do ACL H and HX Mean? H identifies an ACL Rac...

View ACL Performance Parts Products
Bearings

Bearings

Engine and drivetrain bearings for domestic, import, and diesel platforms are stocked at Black Ops Auto Works. Shop main bearings, rod bearings, cam bearings, thrust bearings, wheel bearings, pilot bearings, transmission bearing kits, and differential bearing sets for HEMI 5.7, 6.1, 6.4, and 6.2 supercharged engines, LS and LT platforms, Coyote V8s, Duramax, Cummins, and Power Stroke diesels, and popular import engines like the VQ35, VQ37, VR38DETT, K20, K24, and 2JZ. Every bearing is filterable by year, make, model, engine code, and bearing clearance so the correct part ships the first time. Black Ops Auto Works carries 1250 bearing SKUs across engine internals, transmission and transfer case hardware, differential components, and wheel end assemblies. What This Category Covers Bearings are the precision-fit wear surfaces that keep an engine, transmission, and axle assembly spinning true under load. A correctly sized bearing set with the right clearance is one of the most impor...

View Bearings Products
BMW 1 Series M Parts and Accessories

BMW 1 Series M Parts and Accessories

Find BMW 1 Series M Coupe parts for the E82 M model, also known as the 1M. Its N54 engine, M-specific chassis and installed brake equipment define the application. Identify the M Coupe BMW identifies the 1 Series M Coupe with the N54 3.0L inline-six. Distinguish it from a 135i fitted with an M Sport package and from later M135i models when choosing engine or chassis components. For more model-focused selection guidance, see the BMW 1M collection. Retain the exact chassis and engine application when comparing related components. Build Around the Installed Systems For intake and charge-cooling work, identify the existing inlet, charge pipes, intercooler connections and any turbo changes. Compare complete kit contents before choosing companion hoses or adapters. For brakes and suspension, use explicit M-model coverage. Record caliper, rotor dimensions and material, suspension configuration and wheel clearance. A non-M E82 application should not be carried over to the M Coupe without ma...

View BMW 1 Series M Parts and Accessories Products
BMW 135i Parts and Accessories

BMW 135i Parts and Accessories

Find BMW 135i parts with N54 or N55 engine identification established first. Intake connections, charge-cooling hardware and transmission details matter alongside the chassis and body. N54 and N55 Induction Applications BMW’s 2011 135i update introduced the N55 single twin-scroll turbo engine in place of the earlier twin-turbo application. Use engine identification and production details when comparing intake kits or companion components. Injen intake applications separate early twin-intake arrangements from N55 kits. Compare sensor connections, inlet routing, filter arrangement and heat-shield contents for the actual engine. Brakes and Chassis Components Choose pads and rotors by installed caliper, pad shape, axle and rotor dimensions. Review compound characteristics for street or competition use, then account for sensors and hardware. For coilovers and mounts, identify Coupe or Convertible body, chassis and existing suspension changes. Review spring compatibility, mounting content...

View BMW 135i Parts and Accessories Products
BMW 335i Parts and Accessories

BMW 335i Parts and Accessories

Find BMW 335i parts by engine generation, body and current build specification. N54 and N55 induction, charge-air and exhaust applications need separate consideration. Identify N54 or N55 Use engine identification to distinguish the twin-turbo N54 from the later N55 installation. Intake connections and charge-air hardware should follow that engine application. Record existing intake, charge pipe, intercooler and calibration changes before choosing companion components. For ignition service, use the required plug specification and any documented tuner requirements. Choose the System You Need Compare a complete exhaust with an axle-back, mid-pipe or conversion section. Check body routing, joining points, valve operation and the pieces retained from the existing system. For chassis work, match suspension and brakes to the actual body and drivetrain. Identify calipers and rotor material before comparing pad compounds or sensor kits. Choose Your Part Identify engine, body and drivetrain...

View BMW 335i Parts and Accessories Products
BMW 335i xDrive Parts and Accessories

BMW 335i xDrive Parts and Accessories

Choose BMW 335i xDrive parts with both the turbocharged engine and all-wheel-drive chassis identified. Engine and drivetrain coverage are separate checks within the same build. Engine and Charge-Air Configuration Establish N54 or N55 and the current intake, intercooler and charge-pipe arrangement. Match couplings, sensor ports and breather connections to the installed equipment. For an ignition or calibration-related purchase, retain the documented build requirements. A shared displacement does not establish compatibility across the engine generations. xDrive Installation Requirements Suspension must explicitly cover xDrive, the body and axle loads. Review front driveline clearance, damper travel and alignment requirements before changing ride height. Exhaust and engine accessories can have drivetrain-sensitive routing or clearance. Compare the exact installation instructions with the car’s existing configuration. Choose Your Part Identify N54 or N55 and body. Record charge-air and...

View BMW 335i xDrive Parts and Accessories Products
BMW 335is Parts and Accessories

BMW 335is Parts and Accessories

Shop BMW 335is parts for the N54-powered E92 coupe or E93 convertible. Distinguish its engine, transmission and cooling equipment before planning upgrades. N54 and Transmission Details BMW retained the twin-turbo N54 in the 335is. Do not transfer a later 335i N55 intake or charge-air application without explicit 335is coverage. Identify manual or dual-clutch transmission when choosing driveline components. Review the complete assembly and installation requirements rather than selecting by engine alone. Cooling and Body Configuration The 335is has enhanced cooling equipment. Identify the circuit and original component before choosing a radiator, oil-cooling component, hose or related upgrade. Exhaust and suspension choices need coupe or convertible coverage. Compare valve operation, pipe sections, axle loads and mount condition as part of the installation plan. Choose Your Part Confirm N54 and E92 or E93 body. Identify manual or dual-clutch transmission. Record installed cooling cir...

View BMW 335is Parts and Accessories Products
BMW 335xi Parts and Accessories

BMW 335xi Parts and Accessories

Find BMW 335xi parts for the turbocharged all-wheel-drive 3 Series. Match the exact engine and body before choosing induction or drivetrain-sensitive components. Twin-Turbo Induction Applications For an N54 installation, compare the complete inlet arrangement, meter or sensor provisions, heat shielding and mounting. A twin-inlet kit has a different application from a later single-inlet design. Use the kit’s stated body and production coverage. A coupe listing needs explicit confirmation for another body or the xi drivetrain. AWD Chassis and Controls Select suspension with xi coverage and correct axle loads. Review front-axle clearance and the manufacturer’s permitted lowering and alignment requirements. For a pedal controller, verify the accelerator connector and supported vehicle. Response adjustment is separate from increasing engine output or changing the engine calibration. Choose Your Part Identify engine, body and xi drivetrain. Compare twin-inlet connections and mounting. Ch...

View BMW 335xi Parts and Accessories Products
BMW 535i Parts and Accessories

BMW 535i Parts and Accessories

Explore BMW 535i parts by engine generation and body. Classic naturally aspirated applications and later turbocharged cars need separate intake, service and chassis coverage. Engine Identity Before Induction Use actual engine identification before comparing intake or charge-air components. Earlier classic engines, N54 and N55 applications should not be combined into one installation assumption. For a turbocharged build, record current intake, charge pipe, intercooler and calibration details. Match sensor fittings, couplings and mounting with the installed setup. Exhaust and Chassis Scope Compare exhausts by body, joining points, valves and the exact sections supplied. A conversion component should identify the starting system it requires. For suspension and brake service, record body, drivetrain, axle loads, calipers and rotors. Existing conversions can change the required replacement parts. Choose Your Part Identify engine generation and body. Record induction and calibration chan...

View BMW 535i Parts and Accessories Products
BMW 535i xDrive Parts and Accessories

BMW 535i xDrive Parts and Accessories

Shop BMW 535i xDrive parts with the turbocharged engine and AWD chassis identified. Compare induction kit coverage and drivetrain-sensitive mounting before choosing a component. Engine-Specific Intake Requirements Injen E60 twin-intake selections have defined production and engine coverage. Compare the installed inlet arrangement, filter connections, shielding and mounting rather than transferring a later engine application. A pedal controller has a separate accelerator-interface application. Confirm the vehicle and connector; its response adjustment is not evidence of additional engine output. AWD Chassis and Exhaust Suspension must explicitly cover xDrive, body, axle loads and damper equipment. Review front-driveline clearance and available travel. For exhaust or charge-air sections, identify the existing system and joining points. Compare body routing, sensor ports and mounting with the exact application. Choose Your Part Identify engine, chassis and body. Compare twin-intake co...

View BMW 535i xDrive Parts and Accessories Products
BMW 535xi Parts and Accessories

BMW 535xi Parts and Accessories

Find BMW 535xi parts for the turbocharged AWD 5 Series. Compare engine-specific induction and xi chassis applications before choosing upgrades or service components. Twin-Intake Kit Selection Injen E60 twin-intake applications identify a particular engine and production range. Compare both inlet connections, filter requirements, shielding and mounting. Require explicit coverage for the actual xi body and installation. A later single-inlet engine application is a separate purchase decision. AWD Chassis and Service Equipment Choose suspension with xi, body and axle-load coverage. Record electronic dampers or rear-system equipment and review front-driveline clearance. For brakes, identify caliper, rotor dimensions and axle. Compare pads, sensors and hardware contents separately so the service plan covers the installed assembly. Choose Your Part Identify engine, E60 application and body. Compare both intake connections and filters. Require xi suspension and clearance coverage. Record b...

View BMW 535xi Parts and Accessories Products
BMW 740Li Parts and Accessories

BMW 740Li Parts and Accessories

Choose BMW 740Li parts by long-wheelbase chassis and engine generation. Performance-system components and body-sensitive chassis parts require exact installation coverage. Engine System and Conversion Contents Identify engine and manifold before comparing auxiliary-injection systems or conversion plates. A label covering one engine family should not be extended to another 740Li generation. Compare actual pump, controller, reservoir, plate and plumbing contents. Review the required existing system, companion parts and calibration instructions together. Long-Body Chassis and Exhaust Use long-wheelbase coverage for suspension axle loads and body-sensitive routing or mounting. Identify damper and rear-system equipment before choosing a kit. For brakes, match the installed caliper, rotor dimensions, material and axle. Sensors and fitting hardware need their own application checks. Choose Your Part Identify long-body chassis and engine. Compare complete-system and conversion contents. Re...

View BMW 740Li Parts and Accessories Products
BMW X6 Parts and Accessories

BMW X6 Parts and Accessories

Explore BMW X6 parts with generation, engine and installed equipment identified. Lighting, brake service and engine accessories need exact connections and application coverage. Headlamp and Brake Interfaces Match DRL modules to original headlamp technology, module reference, connector and production period. Styling color alone does not establish electrical compatibility. Brake rotors need correct axle, dimensions, material and side. Match sensors by connector and routing separately from pad or rotor choice. Engine Accessories and Body Details For an injection accessory, distinguish a complete system from a conversion plate. Compare engine interfaces, compatible starting equipment and components supplied. Exhaust and suspension applications require X6 body coverage. Record drivetrain, axle loads, dampers and rear-system arrangement rather than assuming every X5 application transfers. Choose Your Part Identify generation, engine and body equipment. Match original headlamp interfaces....

View BMW X6 Parts and Accessories Products
BMW Z4 Parts and Accessories

BMW Z4 Parts and Accessories

Explore BMW Z4 parts by generation, engine and transmission. Crankshaft dampers and pedal-control accessories need exact application details rather than a shared roadster badge. Crank Damper Specification Compare engine, crank mounting, accessory grooves, pulley dimensions and any stated underdrive or overdrive configuration. Review dry-sump or other build-specific requirements before selecting a damper. Shared Supra/B58 coverage needs the correct engine version and installation. Earlier Z4 engines and unrelated damper families require separate references. Pedal Interfaces and Chassis Details A pedal-response controller must match the vehicle’s accelerator connection and application. It changes response behavior rather than establishing a verified engine-output gain. Brake and suspension parts need generation, engine, caliper or damper equipment and axle-load coverage. Record body and gearbox where routing or installation depends on them. Choose Your Part Identify generation, engin...

View BMW Z4 Parts and Accessories Products
Engine

Engine

Shop automotive engine parts, cooling-system components, oil-system upgrades, ignition parts, pulleys, sensors, gaskets, fuel components, and engine-bay accessories at Black Ops Auto Works. This collection covers vehicle-specific replacement parts, performance upgrades, supporting hardware, and universal components for street cars, trucks, SUVs, Jeeps, diesel vehicles, off-road builds, and motorsport applications. Engine Parts and Performance Components The Engine collection brings together components used throughout the engine, lubrication system, cooling system, ignition system, fuel system, crankcase ventilation, accessory drive, and engine compartment. Available products range from replacement sensors and gaskets to rotating-assembly parts, performance cooling systems, supercharger pulleys, catch cans, cylinder heads, camshafts, intake manifolds, and engine-bay dress-up components. Engine compatibility cannot be determined from vehicle model alone. Confirm the exact year, make, ...

View Engine Products
Engine Block

Engine Block

Engine block parts and internals for HEMI, Hellcat, Trackhawk, TRX, LS, LT, Coyote, EcoBoost, K-Series, VR38DETT, and Cummins diesel builds are stocked at Black Ops Auto Works. Shop main and rod bearings, engine gaskets and gasket kits, engine mounts, block off plates, block heaters, PCV valves, sleeves, engine covers, and complete engines. Every product is filterable by year, make, model, trim, engine, and drivetrain so the correct part ships the first time. Black Ops Auto Works carries 2,187 engine block SKUs across rotating assembly, sealing, mounting, and engine bay dress-up categories. What This Category Covers The Engine Block collection groups the internal and structural components that make up the bottom end and block assembly of a performance or OEM-replacement engine. Coverage spans bearings for rotating assembly refreshes, gaskets and gasket kits for sealing rebuilds, engine mounts for swap and performance builds, and engine bay dress-up pieces for HEMI, Hellcat, and ...

View Engine Block Products
Military & First Responder Discounts

Military & First Responder Discount Program

Black Ops Auto Works proudly honors active duty military, veterans, National Guard, reserves, police officers, firefighters, and EMTs with an exclusive 5% discount on all performance parts and carbon fiber upgrades. Verify instantly and start saving today.

Learn More & Apply

Your cart

×