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SKU: C14207-071 | UPC: 191070590291
Cometic Gasket 2020+ BMW S58B30T0 .071in DST Cyl. Head Gasket - 85mm Bore
Upgrade your BMW S58 engine with the Cometic C14207-071 cylinder head gasket designed for 2020+ models including M3 M4 X3 M X4 M and M2. This .071 inch thick MLS gasket supports 85mm bore configurations for stroker kits and boosted setups while providing reliable sealing under extreme cylinder pressures. Engineered for the S58B30T0 twin-turbo inline-6 it maintains compression and prevents blowouts during high-performance operation.
Key Features
- Multi-Layer Steel (MLS) Design: Three stainless steel layers conform to deck surfaces for leak-free performance even at 50+ psi boost levels
- 0.071 Inch Thickness: Allows precise compression ratio adjustments ideal for big turbo or stroker builds on S58 engines
- 85mm Bore Diameter: Accommodates aftermarket pistons and blocks expanding displacement beyond stock 82mm limits
- Direct Seal Technology (DST): Tapered outer edge and wire-arc sprayed coating enhance combustion chamber isolation and heat resistance
- Precision Laser Etching: Fire ring placement ensures exact OEM bolt hole alignment for straightforward S58 head installs
Product Notes
- Confirm S58B30T0 engine code and 85mm bore prior to purchase for stroker or performance applications
- Inspect head and block surfaces for flatness within 0.002 inches before installation
- Packaged flat in protective sleeve for damage-free delivery
Installation Notes
- Professional installation recommended.
- Clean mating surfaces thoroughly and use Cometic-approved sealer on both sides if needed
- Compatible with OEM head bolts torque to BMW spec in sequence 35 Nm + 90 degrees
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2023 | BMW | M2 | Base |
| 2021 | BMW | M3 | Base |
| 2021 | BMW | M3 | Competition |
| 2021-2022 | BMW | M4 | Base |
| 2021-2022 | BMW | M4 | Competition |
| 2022 | BMW | M4 | Competition xDrive |
| 2020-2023 | BMW | X3 M | - |
| 2020-2022 | BMW | X3 M | Competition |
| 2020-2023 | BMW | X4 M | - |
| 2020-2022 | BMW | X4 M | Competition |
Why Choose Cometic?
- Trusted by NHRA Pro Stock and endurance racing teams for decades of high-horsepower reliability
- Manufactured in the USA with aerospace-grade materials for consistent sealing results
- Custom thicknesses and bores available for exact engine build specifications
Frequently Asked Questions
-
Q: Will this gasket fit a stock bore S58 or only modified engines?
A: Optimized for 85mm bore performance builds it works on modified blocks with larger pistons while compatible with S58 heads -
Q: What material composition provides the sealing strength?
A: Three-layer MLS with 321 stainless steel cores phosphor bronze fire ring and Viton coating for boost and E85 compatibility -
Q: What warranty coverage applies?
A: Cometic offers a one-year unlimited mileage warranty against defects when installed per instructions
Shipping & Handling
- Method: UPS Ground or USPS Priority
- Availability: In stock - ships same or next business day
- Packaging: Flat protective envelope 12in x 10in x 0.5in
- Weight: 0.45 lbs
Cometic Gasket
Cometic Gasket produces precision-machined engine sealing components used by professional engine builders and race teams worldwide. MLS head gaskets, intake gaskets, and complete engine gasket sets from Cometic are engineered to hold seal under the elevated cylinder pressure and heat cycling that OEM gaskets cannot always survive in high-performance applications.Popular UpgradesCometic MLS (multi-layer steel) head gaskets are the most-requested upgrade for turbocharged, supercharged, and naturally aspirated builds where cylinder pressure exceeds the limits of OEM composite gaskets. Available in bore sizes and thicknesses calibrated to manage compression ratio, Cometic MLS head gaskets are a standard specification for any serious engine build. Intake manifold gaskets, exhaust gaskets, and cam cover sets round out the range for complete engine assembly work.Why use Cometic MLS head gaskets over OEM?Cometic MLS head gaskets use multiple layers of embossed stainless steel that create a ...
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