R56 N12 N14 N18 Engine 1.2mm JCW Head gasket

R56 N12 / N14 / N18 Engine

1.2mm JCW Performance Head Gasket

Not your stock gasket. A trade-up engineered for real output and durability.

When you build a high-performance R56 MINI engine — whether it’s JCW power targets, tuned compression, or daily-driven boost — the head gasket becomes a strategic component, not a commodity. The SneedSpeed 1.2mm JCW head gasket gives you a thicker, stronger, more resilient seal that handles elevated pressures and thermal stress far better than the OEM part.

This is the gasket you install if you plan to run higher boost, more aggressive timing, or sustained high-load duty.

Built for Performance Builds

Factory head gaskets are designed around stock power levels and duty cycles. Once you increase cylinder pressures — through turbo upgrades, tuning, or track driving — the stock seal becomes the first limiting point. The SneedSpeed 1.2mm JCW head gasket adds material thickness and engineered sealing integrity where it matters most, increasing resistance to head lift, combustion leakage, and gasket failure.

This isn’t a “like-for-like” replacement — it’s a strategic upgrade for durability and performance.

Key Performance Advantages

• 1.2mm head thickness
  Increased surface area and robustness for improved sealing under elevated pressures and heat cycles.

• Optimized for JCW-level output
  Engineered to match the requirements of tuned, higher-output naturally aspirated and mild-boost builds.

• Improved clamping stability
  Maintains seal integrity through higher RPMs, aggressive tuning, and track use.

• Direct fit for R56 N12/N14/N18 platforms
  Precision engineering for seamless installation—no modifications required.

Recommended For

• JCW tune builds and performance upgrades

• Increased boost or timing over stock calibrations

• Engines with upgraded cooling or intake/exhaust systems

• High-mileage engines undergoing top-end rebuilds

SneedSpeed Performance Philosophy

In performance builds, every gasket is a system component — not a throwaway part. The SneedSpeed 1.2mm JCW head gasket gives you the confidence to push harder and run smarter.

You’ve already invested in power adders and engine upgrades; don’t let a stock gasket be the limiter.