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5150 AutoSport

5150 AutoSport Head Gasket & Head Stud Kit, BMW M52TU/M54

5150 AutoSport Head Gasket & Head Stud Kit, BMW M52TU/M54

Regular price $729.98 USD
Regular price Sale price $729.98 USD
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Head Gasket Type - Bore - Thickness
Head Stud Kit Coating

MLS Head Gasket:

The Cometic MLS Head Gasket is a replacement for BMW part numbers #11127501304 and #11127501305, specifically designed for use with the M52TU and M54 Aluminum Block engine types, which were incorporated into various BMW models. The M52TU engine, an updated version of the M52 engine, featured BMW's Double VANOS variable valve timing technology. It was used in BMW models such as the 3 Series, 5 Series, and Z3 and was replaced by the M54 engine in 2000 in most BMW models.

Multi-Layer Steel also known as "MLS" head gaskets are preferred as an aftermarket alternative for high-performance BMW engines, including supercharged and turbocharged models, as they offer better performance than factory gaskets.

The M54 engines have a bore of 84 mm and a thickness of 0.027 inches. 

MLS Gaskets provide maximum sealing performance for high-output engines, without the need for sealants. These gaskets resist shearing forces and reduce bore distortion with their embossing design.

Comprised of multiple layers of stainless steel, they are durable and corrosion-resistant. Ideal for high-performance engines, MLS head gaskets offer superior sealing and can withstand high levels of heat and pressure.

When choosing an MLS gasket for your BMW, ensure compatibility, thickness, and bore size, and follow installation and torque specifications to avoid engine damage.

MLS head gaskets can NOT be used with motors that have O-rings or receiver grooves around the cylinder bores because they require smooth and flat surfaces to seal.

Cut-Ring Head Gasket:

This Athena Cut Ring Head Gasket is a replacement for BMW part numbers #11127501304 and #11127501305, specifically designed for use with the M52TU and M54 Aluminum Block engine types. 

Standard OEM & MLS gaskets can only handle a certain amount of cylinder pressures before they start to leak, making the Athena Cut Ring Head Gasket the recommended choice for applications making 16+ psi.

A compression leak passing the head gasket can cause a range of issues, including engine overheating, loss of power, misfires, and in severe cases, catastrophic engine failure.

Athena's gasket is crafted with premium quality reinforced M0115, an asbestos-free material that's original equipment approved and renowned for its superior quality. The AISI 304 stainless steel Cooper Rings bite into the aluminum head, providing maximum sealing capabilities around the cylinder bore and optimizing engine performance, even on engines with nitrous and/or turbo applications that exceed 2 bar boost.

Before installation, it is crucial to have the mating surfaces of the cylinder head and block professionally cleaned and resurfaced to ensure they are completely flat.

Please be aware that the gasket  should have a size that is 0.5mm to 1mm larger than the piston. For example, if the piston measures 84mm, then the gasket should be the next size up, either 84.5mm or 85mm.

Head Gasket Installation instructions:

  1. Make sure that the engine block and cylinder head surfaces are clean, flat, and free from any debris, oil, or coolant.

  2. Install the head gasket on the engine block and ensure that it is properly aligned. Avoid twisting or bending the gasket during installation.

  3. Place the cylinder head on top of the gasket and install the head bolts or studs in their correct positions.

  4. Follow the manufacturer's recommended torque specifications and tighten the bolts or studs in the proper sequence to ensure even clamping force across the gasket.

  5. After the initial tightening, re-torque the head bolts or studs after the engine has been started and then allowed to cool to room temperature. This will ensure that the gasket is properly seated and compressed.

  6. It is recommended to not use any additional sealant on the gasket, as it is already coated with a Viton rubber sealant. Using additional sealant can hinder the performance of the gasket.

Head Stud Kit

BMW M54 Engine Pro-Series 18.8 Cylinder Head Stud Set

Replacing the original cylinder head screws with high-strength Pro-Series 18.8 studs is necessary when making large increases in performance, as the original cylinder head screws elongate during operation and the cylinder head can lift off.

The Pro-Series 18.8 stud bolts with a tensile strength of 1850 N / mm² provide a solution to this.

In addition, these stud bolts do not have to be replaced after dismantling but can be reused.

Kit Contents:

(14) M10 Stud Bolts
(14) M10 Nuts

(14) Washers
Assembly Paste
Assembly Instructions

Tensile strength: PS 18.8 steel / 1850+ N/mm² (270.000+PSI)

A special steel is used which, after tempering, has a tensile strength of 1850 + N / mm².

All threads are formed and not cut as usual. The so-called rolling of threads can increase the strength of the tooth flanks by around 30%.

All Pro-Series products are supplied with a nickel coating or optional with a burnished protecting against corrosion in the long term, even under the toughest conditions. Pro-Series stud bolts have a hexagon socket drive on the head side for screwing in the stud bolts. Due to a cone on the engine block side of the bolt, these are not supported on the thread flanks when the nuts are tightened, but in the bore of the thread in the engine block. This support protects the threads when racing engines are frequently rebuilt.

Pro-Series advantage over other manufacturers is the nuts and washers included in the set, these also have a tensile strength of 1850 N / mm².

Application list:

BMW 320i E46 MY 2000-2007
BMW 325i E46 MY 2000-2007
BMW 330i E46 MY 2000-2007
BMW 520i E39 MY 2000-2003
BMW 520i E60/61 MY 2003-2005
BMW 525i E39 MY 2000-2003
BMW 525i E60/61 MY 2003-2005
BMW 530i E39 MY 2000-2003
BMW 530i E60 MY 2003-2005
BMW 730i/Li E65/66 MY 2003-2005
BMW X3 2.5i E83 MY 2004-2006
BMW X3 3.0i E83 MY 2004-2006
BMW X5 3.0i E53 MY 2000-2006
BMW Z3 2.2i E36/7 MY 2000-2002
BMW Z3 3.0i E36/7/8 MY 2000-2002
BMW Z4 2.2i E85 MY 2003-2005
BMW Z4 2.5i E85 MY 2002-2005
BMW Z4 3.0i E85 MY 2002-2005

Manufactured in Germany

Installation Instructions:

1. After unpacking ProSeries stud bolts, inspect all hardware prior to installation. Look for obvious defects or shipping damage. Contact our sales team immediately with any questions or issues.
2. Before mounting, compare the supplied bolts with the stock screws, paying particular attention to the thread type and length of the bolts.
Check existing threads inside engine block for damage. To ensure proper thread engagement and accurate torque readings, make sure that all threads are free from remnant sealer, lubricant, and debris. Check the flatness and surface finish of the engine block and cylinder head deck to avoid gasket failure.
3. Insert stud bolts into the engine block and tighten with a 5mm hexagon socket on the drive provided at the head of the stud bolt with a torque of 15Nm.
4. If the stud bolts are to remain permanently installed in the engine block, they can be used with screw lock (not included)
5. Attention! Before final mounting of Pro-Series nuts and washers, all contact surfaces must be completely wetted with the supplied special ProSeries lubricant.
If this will not be considered the applied tightening torque is falsified and the resulting clamping force is reduced. Under certain circumstances, this can also inevitably lead to the bolts breaking / shearing off.

6. Tighten nuts in three equal steps in the factory sequence. For the last pass, refer to the table shown below:

Thread Type
M9 x 1.25 1.25 Nm 2.45 Nm 3.65 Nm
M10 x 1.25 1.30 Nm 2.60 Nm 3.85 Nm
M11 x 1.125 1.40 Nm 2.80 Nm 2.80 Nm
M12 x 1.25 1.45 Nm 2.90 Nm 3.130 Nm

7. ProSeries studs and nuts can always be reused. When re-tightening or reassembling, please always ensure that all contact surfaces are wetted with special ProSeries lubricant. Please contact our sales team if you have any further questions.


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