SneedSpeed Super Duty Head Gaskets for R56 MINI Cooper — N12, N14, N18 (.9mm & 1.2mm)
The SneedSpeed Super Duty Head Gasket is built for MINI engines making more horsepower than stock.
If you’re searching for a MINI Cooper head gasket upgrade, R56 head gasket, or N14/N18 performance head gasket, this is the solution built to handle boost, heat, and real horsepower.
The SneedSpeed Super Duty Head Gasket line fits:
- R56 MINI Cooper S
- N12, N14, and N18 engines
- Street builds, tuned builds, and high-horsepower setups
This is not a stock replacement gasket.
This is the gasket you install when your MINI is making more power than factory parts can reliably handle.
SneedSpeed Super Duty Head Gasket Options
.9mm SneedSpeed Super Duty Head Gasket — Street Series (S Replacement)
Best for street performance MINI builds and stock replacement upgrades
- Matches S model head gasket thickness
- Supports 10.5:1 compression ratio
- Ideal for mild to moderate horsepower builds
- Stronger sealing than OEM MINI head gasket
This is the correct choice for:
- R56 MINI Cooper S head gasket replacement
- N14 or N18 street builds
- Bolt-on + tuned MINI engines
- Drivers who want performance without sacrificing response
1.2mm SneedSpeed Super Duty Head Gasket — Super Sport (JCW Size)
Best for high-horsepower MINI builds and boosted applications
- Matches JCW head gasket thickness
- Supports 10.0:1 compression ratio
- Designed for high boost and higher horsepower builds
- Increased sealing margin vs stock MINI head gasket
This is the correct choice for:
- JCW-level builds
- Upgraded turbo MINI engines
- High horsepower N14/N18 builds
- Track and aggressive driving setups
Why Upgrade to a SneedSpeed Super Duty Head Gasket?
A factory MINI Cooper head gasket is designed for stock horsepower.
Once you increase:
- Boost
- Horsepower
- Cylinder pressure
…the stock gasket becomes a failure point.
The SneedSpeed Super Duty Head Gasket is built to:
- Improve sealing under higher horsepower
- Resist head lift under boost
- Handle increased heat and cylinder pressure
- Support performance builds without failure
Fitment
- R56 MINI Cooper S
- N12, N14, N18 engines
- Direct-fit replacement — no modification required
Which SneedSpeed Super Duty Head Gasket Should You Choose?
- Stock / mild build / street use → .9mm Super Duty Head Gasket
- High horsepower / boost / aggressive build → 1.2mm Super Duty Head Gasket
If your MINI is making more power than stock,
you should not be running a stock gasket.
SneedSpeed Standard
If we wouldn’t run it in our own engines, we don’t sell it.
The SneedSpeed Super Duty Head Gasket exists for one reason:
To keep your MINI engine sealed when you start making real horsepower.
