Cometic Gasket 2020+ BMW S58B30T0 .071in DST Cyl. Head Gasket – 85mm Bore

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