
| Sizes | STD, .025, .25, .50 |
| Oil Clearance | |
| Half Type | Upper & lower |
| Material | F780 |
| Min. Std Shaft Size | 54,951 mm / 2.1634 in |
| Max. Std Shaft Size | 54,975 mm / 2.1644 in |
| Min. Std Tunnel Size | 58,645 mm / 2.3089 in |
| Max. Std Tunnel Size | 58,658 mm / 2.3094 in |
| Max Wall at Crown | 1,827 mm / 0.0719 in |
| Max Overall Length |
26,95 mm / 1.0610 in (2428H(F))
20 mm / 0.7874 in (2429H)
|
| Notes | |
| Diagrams |
2428H-L (4)
![]() 2428H-U (4)
![]() 2429H-L (1,2,3,5,6,7)
![]() 2429H-U (1,2,3,5,6,7)
|


|
Product detailed specification |
|
|
Bore size |
83.00mm |
|
Stroke |
92.80mm |
|
Supertech compression ratio (CR) |
9.0:1 |
|
OEM compression ratio (CR) |
9.5:1 |
|
Dome volume (CC) |
-15cm3 |
|
Compression height (CH) |
29.50mm |
|
Pin diameter |
20mm |
|
Features |
Accepts Turbo and Nitrous, Round piston skirt |
|
Fits for |
VAG - 1.8T 20V |

|
Product detailed specification |
|
|
Bore size |
92.00mm |
|
Stroke |
75.20mm |
|
Mahle compression ratio (CR) |
12.2:1 |
|
OEM compression ratio (CR) |
12.0:1 |
|
Dome volume (CC) |
12.2cm3 |
|
Compression height (CH) |
27.30mm |
|
Pin diameter |
21mm |
|
Features |
Accepts Turbo and Nitrous |
|
Fits for |
BMW M3 E90 - 4.0 (S65B40) |

|
Product detailed specification |
|
|
Bore size |
87.50mm |
|
Stroke |
91.00mm |
|
Mahle compression ratio (CR) |
11.5:1 |
|
OEM compression ratio (CR) |
11.3:1 |
|
Dome volume (CC) |
-13.1cm3 |
|
Compression height (CH) |
32.30mm |
|
Pin diameter |
21mm |
|
Features |
Accepts Turbo and Nitrous |
|
Fits for |
BMW M3 E46 - 3.2 S54B32 |

|
Product detailed specification |
|
|
Bore size |
87.50mm |
|
Stroke |
91.00mm |
|
Mahle compression ratio (CR) |
12.5:1 |
|
OEM compression ratio (CR) |
11.3:1 |
|
Dome volume (CC) |
-9.2cm3 |
|
Compression height (CH) |
32.30mm |
|
Pin diameter |
21mm |
|
Features |
Accepts Turbo and Nitrous |
|
Fits for |
BMW M3 E46 - 3.2 S54B32 |




COMETIC MLS (Multi-Layer Steel) Head Gaskets provide maximum sealing performance for today's high output engines and require no sealants. MLS gaskets are ideal for both aluminum heads to aluminum blocks and aluminum heads to cast iron blocks. They can withstand the shearing force created by the two materials. MLS gaskets have increased strength because they are comprised of multiple layers of stainless steel; which also creates the ability to rebound and resist corrosion. The outer layers are embossed and coated on both sides with Viton (a flouroelastomer rubber based material that is heat resistant to 250 C/ 482 F). Viton is designed to meet the demands of a variety of harsh sealing environments, load conditions, and surface finishes. The center or shim layer is uncoated stainless steel, which can be varied to accommodate multiple thickness requirements.