Cometic MLS Head Gasket 85mm .140in — Fits 90-99 BMW M50/M52 323i 325i 328i 525i 528i

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Car Wheel Size Chart

Wheel Diameter (inches) Tire Width (mm) Aspect Ratio Rim Width (inches)
14185655.5
15195606.0
16205556.5
17215507.0
18225457.5
19235408.0
20245358.5

Note: Wheel and tire sizes vary by car make and model. Always consult your vehicle’s manufacturer for exact specifications.

How to Read Tire Size

Example: 225/45R17 means:

  • 225 = Tire width in mm
  • 45 = Aspect ratio (height as % of width)
  • R17 = Rim diameter in inches

Product Details

Product Description
Part Numbers
Sizing & Fit

About Cometic Gasket

Cometic Gasket is the world leader in custom multi-layer steel head gaskets for performance and motorsport engines. From off-the-shelf MLS for popular platforms to bespoke gaskets for race-only builds, Cometic seals everything from Honda B-series to LSX.

Ultimate Sealing for BMW M50 and M52 Engines

The Cometic MLS (Multi-Layer Steel) Head Gasket is the gold standard for high-performance BMW engine builds. Specifically designed for the M50B25 and M52B28 engines, this 85mm bore, .140-inch thick gasket provides a superior seal for forced induction or high-compression naturally aspirated setups. By utilizing multiple layers of stainless steel, this gasket offers exceptional rebound and resistance to the shearing forces common in high-output engines.

Key Features and Benefits

  • Compressed Thickness: 0.140 inch
  • Bore Size: 85mm
  • Material: Multi-Layer Stainless Steel with Viton Coating
  • Compatibility: BMW M50/M52 323i, 325i, 328i, 525i, 528i
  • No Sealant Required: Precision engineering for a perfect fit

The outer layers are embossed and coated on both sides with Viton, a high-temperature fluoroelastomer rubber capable of withstanding temperatures up to 250°C (482°F). This coating ensures a micro-seal against surface imperfections on the cylinder head and block. Whether you are running an aluminum head on an iron block or an all-aluminum configuration, this gasket is designed to handle the thermal expansion and contraction cycles of performance driving. Upgrade your engine's reliability with professional-grade gaskets from GGCRACING.

Vehicle Fitment

Years Make Model Trim
1998-2000 BMW 323i Base
1998-1999 BMW 323is Base
1991-1995 BMW 325i Base
1991 BMW 325iX Base
1991-1995 BMW 325is Base
1996-1999 BMW 328i Base
1996-1999 BMW 328is Base
1990-1995 BMW 525i Base
1993 BMW 525iT Base
1997-2000 BMW 528i Base
1997-1999 BMW Z3 Roadster
1998-1999 BMW Z3 M Roadster
1999-2000 BMW Z3 M Coupe

Product Details

Product Description
Part Numbers
Sizing & Fit

About Cometic Gasket

Cometic Gasket is the world leader in custom multi-layer steel head gaskets for performance and motorsport engines. From off-the-shelf MLS for popular platforms to bespoke gaskets for race-only builds, Cometic seals everything from Honda B-series to LSX.

Ultimate Sealing for BMW M50 and M52 Engines

The Cometic MLS (Multi-Layer Steel) Head Gasket is the gold standard for high-performance BMW engine builds. Specifically designed for the M50B25 and M52B28 engines, this 85mm bore, .140-inch thick gasket provides a superior seal for forced induction or high-compression naturally aspirated setups. By utilizing multiple layers of stainless steel, this gasket offers exceptional rebound and resistance to the shearing forces common in high-output engines.

Key Features and Benefits

  • Compressed Thickness: 0.140 inch
  • Bore Size: 85mm
  • Material: Multi-Layer Stainless Steel with Viton Coating
  • Compatibility: BMW M50/M52 323i, 325i, 328i, 525i, 528i
  • No Sealant Required: Precision engineering for a perfect fit

The outer layers are embossed and coated on both sides with Viton, a high-temperature fluoroelastomer rubber capable of withstanding temperatures up to 250°C (482°F). This coating ensures a micro-seal against surface imperfections on the cylinder head and block. Whether you are running an aluminum head on an iron block or an all-aluminum configuration, this gasket is designed to handle the thermal expansion and contraction cycles of performance driving. Upgrade your engine's reliability with professional-grade gaskets from GGCRACING.

Vehicle Fitment

Years Make Model Trim
1998-2000 BMW 323i Base
1998-1999 BMW 323is Base
1991-1995 BMW 325i Base
1991 BMW 325iX Base
1991-1995 BMW 325is Base
1996-1999 BMW 328i Base
1996-1999 BMW 328is Base
1990-1995 BMW 525i Base
1993 BMW 525iT Base
1997-2000 BMW 528i Base
1997-1999 BMW Z3 Roadster
1998-1999 BMW Z3 M Roadster
1999-2000 BMW Z3 M Coupe

Product Details

Product Description

About Cometic Gasket

Cometic Gasket is the world leader in custom multi-layer steel head gaskets for performance and motorsport engines. From off-the-shelf MLS for popular platforms to bespoke gaskets for race-only builds, Cometic seals everything from Honda B-series to LSX.

Ultimate Sealing for BMW M50 and M52 Engines

The Cometic MLS (Multi-Layer Steel) Head Gasket is the gold standard for high-performance BMW engine builds. Specifically designed for the M50B25 and M52B28 engines, this 85mm bore, .140-inch thick gasket provides a superior seal for forced induction or high-compression naturally aspirated setups. By utilizing multiple layers of stainless steel, this gasket offers exceptional rebound and resistance to the shearing forces common in high-output engines.

Key Features and Benefits

  • Compressed Thickness: 0.140 inch
  • Bore Size: 85mm
  • Material: Multi-Layer Stainless Steel with Viton Coating
  • Compatibility: BMW M50/M52 323i, 325i, 328i, 525i, 528i
  • No Sealant Required: Precision engineering for a perfect fit

The outer layers are embossed and coated on both sides with Viton, a high-temperature fluoroelastomer rubber capable of withstanding temperatures up to 250°C (482°F). This coating ensures a micro-seal against surface imperfections on the cylinder head and block. Whether you are running an aluminum head on an iron block or an all-aluminum configuration, this gasket is designed to handle the thermal expansion and contraction cycles of performance driving. Upgrade your engine's reliability with professional-grade gaskets from GGCRACING.

Vehicle Fitment

Years Make Model Trim
1998-2000 BMW 323i Base
1998-1999 BMW 323is Base
1991-1995 BMW 325i Base
1991 BMW 325iX Base
1991-1995 BMW 325is Base
1996-1999 BMW 328i Base
1996-1999 BMW 328is Base
1990-1995 BMW 525i Base
1993 BMW 525iT Base
1997-2000 BMW 528i Base
1997-1999 BMW Z3 Roadster
1998-1999 BMW Z3 M Roadster
1999-2000 BMW Z3 M Coupe

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