5150 AutoSport BMW S55 Complete Engine Build Kit

Build your BMW S55 engine for serious power with the 5150 AutoSport Complete Engine Build Kit, a comprehensive collection of high-performance internal engine components developed for the BMW F80 M3, F82/F83 M4 and F87 M2 Competition.

The factory BMW S55 3.0-litre twin-turbocharged straight-six is an extremely capable performance engine, but owners pursuing significantly increased horsepower, larger turbochargers and higher boost pressures will eventually need to consider the limitations of the original engine internals.

Rather than sourcing individual components from multiple manufacturers and attempting to determine which combinations work best together, the 5150 AutoSport S55 Engine Build Kit brings together a proven selection of forged pistons, performance connecting rods, upgraded valvetrain components, camshafts, bearings and cylinder head hardware.

Developed using 5150 AutoSport's experience with high-performance BMW engine builds, this package is intended to provide the core internal components required for a comprehensive S55 engine build.

Customers can choose between Ferrea or SuperTech valvetrain components and CP-Carrillo or Manley connecting rods, allowing the package to be configured around their individual build requirements.

Key Features

• Complete high-performance engine internals package for the BMW S55

• Designed for high-horsepower and high-boost engine builds

• Suitable for BMW F80 M3, F82/F83 M4 and F87 M2 Competition applications

• CP-Carrillo x 5150 AutoSport Pro-Xtreme forged pistons

• Heavy-duty piston pins

• Choice of CP-Carrillo or Manley connecting rods

• Choice of Ferrea or SuperTech valvetrain

• Upgraded intake and exhaust valves

• High-performance valve springs and valve locks

• CAT Cams 278° / 272° camshaft kit

• ARP Custom Age 625+ cylinder head studs

• Genuine BMW cylinder head gasket

• Calico-coated high-performance connecting rod bearings

• Calico-coated high-performance main bearings

• Components selected using 5150 AutoSport's engine-building experience

• Pre-shipment consultation to confirm the engine specification

A Complete Engine Build Package For The BMW S55

Building a high-performance BMW S55 involves considerably more than simply replacing the factory pistons and connecting rods.

As power and boost pressure increase, additional demands are placed on the pistons, connecting rods, bearings, cylinder head fastening system and valvetrain. Choosing appropriate components for each area is essential when developing an engine intended for substantially increased output.

The 5150 AutoSport Complete Engine Build Kit addresses these requirements by combining upgraded components for both the S55 bottom end and cylinder head.

Rather than treating each component as an isolated upgrade, the package provides a coordinated selection of parts intended to work together as the foundation of a high-performance engine build.

This makes it particularly attractive for owners planning a fully built S55 engine for upgraded turbocharger applications, drag racing, track use or other demanding performance builds.

What's Included In The 5150 AutoSport S55 Engine Build Kit?

The complete package includes the following components:

The final piston specification, compression ratio and other build-specific requirements are confirmed during the consultation process before the kit is dispatched.

CP-Carrillo x 5150 AutoSport Pro-Xtreme Forged Pistons

At the heart of the engine build kit are the CP-Carrillo x 5150 AutoSport Pro-Xtreme forged pistons.

Pistons are among the most heavily loaded components inside a high-output turbocharged engine. As cylinder pressures and combustion temperatures increase, piston construction and specification become increasingly important.

The Pro-Xtreme pistons are intended for demanding performance applications where the engine will be operating beyond its original factory power output.

The kit also includes heavy-duty piston pins, providing the corresponding upgraded connection between the pistons and connecting rods.

Because different engine builds can require different piston specifications, 5150 AutoSport confirms the appropriate configuration with the customer before shipping.

This includes discussing the intended compression ratio, which must be selected in conjunction with the complete engine specification and intended use.

CP-Carrillo Or Manley Performance Connecting Rods

The kit is available with two connecting rod configurations:

Option 1: CP-Carrillo x 5150 AutoSport Pro-Xtreme Connecting Rods

A premium connecting rod option intended for demanding high-performance S55 engine builds. This configuration pairs CP-Carrillo connecting rods with the included CP-Carrillo Pro-Xtreme forged pistons.

Option 2: Manley Performance Connecting Rods

An alternative high-performance connecting rod option from Manley, another established manufacturer of performance engine internals.

Both options are intended to replace the original S55 connecting rods as part of a complete engine build.

The best choice will depend on the intended power output, engine configuration, operating conditions and preferences of the engine builder.

High-Performance Ferrea Or SuperTech Valvetrain

As part of the complete engine build package, 5150 AutoSport includes an upgraded valvetrain with a choice of two manufacturers:

• Ferrea

• SuperTech

Both configurations include:

• High-performance valve springs

• High-performance intake valves

• High-performance exhaust valves

• High-performance valve locks

The valvetrain plays a critical role in controlling the movement of the intake and exhaust valves as engine speed increases.

For engines fitted with more aggressive camshafts or intended to operate under demanding conditions, the correct valve spring and valve component specification becomes particularly important.

The upgraded valvetrain components in this package are selected to support the overall engine build and work alongside the included CAT Cams performance camshafts.

CAT Cams 278° / 272° Performance Camshaft Kit

The 5150 AutoSport S55 Engine Build Kit includes a CAT Cams 278° / 272° camshaft kit.

Camshafts control the opening and closing of the engine's intake and exhaust valves, influencing how air enters the cylinders and how exhaust gases leave the combustion chambers.

For a high-performance turbocharged engine, camshaft selection is an important part of optimising airflow and supporting the intended power delivery.

The included CAT Cams package features:

• 278° camshaft specification

• 272° camshaft specification

These performance camshafts are intended to form part of a more comprehensive S55 engine build rather than being treated as a standalone upgrade.

Correct installation, timing and compatibility with the selected valvetrain components are essential.

Engine calibration and supporting modifications will also need to be considered when using performance camshafts.

ARP Custom Age 625+ Cylinder Head Studs

The package includes an ARP Custom Age 625+ cylinder head stud kit, replacing the corresponding factory cylinder head fastening hardware.

As boost pressure and cylinder pressure increase, maintaining a secure seal between the cylinder head and engine block becomes increasingly important.

High-performance cylinder head studs are commonly used in built turbocharged engines to provide a fastening solution appropriate for demanding operating conditions.

ARP's Custom Age 625+ material is widely used in high-performance engine applications where exceptional fastener strength is required.

When combined with the included Genuine BMW cylinder head gasket, these studs form part of the upgraded cylinder head sealing arrangement.

Correct installation procedures, preparation and tightening specifications must be followed by the engine builder.

Genuine BMW Cylinder Head Gasket

A Genuine BMW cylinder head gasket is included as part of the package.

The head gasket seals the interface between the engine block and cylinder head, helping maintain separation between combustion chambers, coolant passages and oil galleries.

Including a Genuine BMW gasket allows the build to retain an original BMW sealing component alongside the upgraded ARP head studs.

The engine builder should confirm that the gasket specification is appropriate for the final engine configuration, including any machining or dimensional changes made during the build.

Calico-Coated High-Performance Rod Bearings

The 5150 AutoSport kit includes Calico-coated high-performance connecting rod bearings.

Connecting rod bearings operate between the crankshaft journals and the connecting rods, supporting the rotating assembly under substantial mechanical loads.

As engine output increases, bearing selection, oil clearance and lubrication become particularly important.

The supplied 5150 AutoSport performance bearings feature a Calico coating intended for demanding engine applications.

These bearings are included as part of the complete rotating assembly package and should be installed only after the engine builder has measured and confirmed the appropriate bearing clearances.

Calico-Coated High-Performance Main Bearings

In addition to the connecting rod bearings, the kit includes Calico-coated high-performance main bearings.

The main bearings support the crankshaft within the engine block and are critical to the operation of the rotating assembly.

Correct bearing fitment is particularly important during a forged engine build, where crankshaft condition, journal dimensions, bearing clearances and oil supply must all be considered.

The inclusion of both rod and main bearings allows the engine builder to address these components together during the bottom-end assembly process.

Built For High-Boost S55 Applications

The BMW S55 is a popular platform for high-horsepower engine builds, with substantial aftermarket support for upgraded turbochargers, fuelling systems, cooling and engine management.

However, increasing boost pressure and power output also increases the demands placed on the engine's internal components.

The 5150 AutoSport Complete Engine Build Kit is intended for owners progressing beyond a conventional bolt-on tuning setup and planning a more comprehensive engine build.

Typical applications include:

• High-horsepower BMW S55 builds

• Upgraded twin-turbocharger setups

• Single-turbo S55 conversions

• High-boost engine configurations

• Drag racing builds

• Track-focused performance builds

• Complete engine rebuilds incorporating forged internals

Important: The kit does not have a universal guaranteed horsepower rating. The achievable power output and engine reliability depend on the final component specifications, engine preparation, machining, calibration, supporting modifications and operating conditions.

Choose Your Engine Build Configuration

Two major component selections are available when ordering.

Valvetrain Options

• Ferrea

• SuperTech

Connecting Rod Options

• CP-Carrillo Pro-Xtreme

• Manley Performance

This allows the package to be configured around the intended engine build rather than forcing every customer into exactly the same component combination.

The piston configuration and compression ratio are then confirmed through the mandatory consultation process.

BMW S55 Engine Compatibility

The 5150 AutoSport Complete Engine Build Kit is designed for the BMW S55 3.0-litre twin-turbocharged straight-six engine.

Compatible BMW applications include:

• BMW F80 M3 Saloon

• BMW F80 M3 Competition

• BMW F82 M4 Coupé

• BMW F82 M4 Competition

• BMW F83 M4 Convertible

• BMW F83 M4 Competition

• BMW F87 M2 Competition

• BMW F87 M2 CS

• BMW F80 M3 CS

• BMW F82 M4 CS

• BMW F82 M4 GTS

Fitment and the required engine specifications should be confirmed before ordering.

This kit is not intended for the original N55-powered BMW F87 M2 or the S58-powered BMW G80/G81 M3, G82/G83 M4 and G87 M2.

Professional Engine Building Required

The 5150 AutoSport Complete Engine Build Kit is intended for installation by an experienced performance engine builder.

This is not a simple bolt-on modification. Installation requires substantial engine disassembly, precision measurement and correct assembly procedures.

Depending on the condition and specification of the engine, additional work may include:

• Engine block inspection and machining

• Cylinder bore measurement and preparation

• Piston-to-wall clearance measurement

• Connecting rod and main bearing clearance measurement

• Crankshaft inspection

• Cylinder head inspection and preparation

• Valve spring installation and measurement

• Camshaft installation and timing

• Rotating assembly balancing

• Engine calibration and supporting system upgrades

Additional components, machining, labour and tuning may be required to complete the engine build.

The supplied package provides the specified internal engine components, not a complete assembled engine or every ancillary component required for installation.

Why Choose 5150 AutoSport?

5150 AutoSport specialises in high-performance BMW engine components and engine-building solutions, with extensive experience supporting customers pursuing significantly increased engine output.

Rather than leaving customers to select pistons, rods, bearings, camshafts and valvetrain components independently, the Complete S55 Engine Build Kit combines the components that 5150 AutoSport recommends based on its engine-building experience.

Key advantages include:

• Comprehensive S55 internal engine package

• High-performance components from established manufacturers

• Forged CP-Carrillo piston construction

• Choice of connecting rod manufacturer

• Choice of upgraded valvetrain

• CAT Cams performance camshafts

• ARP Custom Age 625+ head studs

• Coated rod and main bearings

• Build-specific consultation before shipping

For owners planning a serious S55 engine build, this approach simplifies component selection while allowing important specifications to be confirmed before assembly.

Why Buy From R44 Performance?

R44 Performance specialises in BMW M3, M4 and M2 performance upgrades, with extensive experience supplying components for modified S55-powered vehicles.

Our range covers everything from conventional bolt-on modifications to supporting components for high-horsepower BMW engine builds.

When you purchase the 5150 AutoSport BMW S55 Complete Engine Build Kit from R44 Performance, you'll benefit from:

• Genuine 5150 AutoSport components

• Specialist BMW S55 product knowledge

• Choice of Ferrea or SuperTech valvetrain

• Choice of CP-Carrillo or Manley connecting rods

• Mandatory engine specification consultation before dispatch

• Access to complementary S55 performance components

• UK and worldwide shipping

• Dedicated customer support

For owners building a BMW F80 M3, F82/F83 M4 or F87 M2 Competition for substantially increased power, the 5150 AutoSport S55 Complete Engine Build Kit provides a comprehensive foundation of forged pistons, performance connecting rods, upgraded valvetrain components, camshafts, bearings and cylinder head hardware in one configurable package.

Unless explicitly stated otherwise, all products sold by R44 Performance Limited are designated RACE ONLY and are solely for competition or off-road use limited to racing formally sanctioned by a recognized racing organization. Any other use, including recreational off-road use, may violate local, state, and Federal laws. R44 Performance Limited does not implicitly or explicitly confirm the legality of using any products it sells on public roads; that is entirely the responsibility of the consumer.

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