SneedSpeed N18 Remanufactured Cylinder Head Assembly

2011–2017 MINI Cooper S N18 Cylinder Head

Restore Power. Restore Reliability.

The SneedSpeed N18 Remanufactured Cylinder Head Assembly is a fully assembled, professionally remanufactured replacement cylinder head designed for 2011–2017 MINI Cooper S models equipped with the turbocharged N18 engine.

Whether you're repairing timing chain damage, correcting valve sealing issues, rebuilding a high-mileage engine, or replacing a failed cylinder head, this assembly provides the foundation your engine needs to perform reliably for years to come.

Built from an OEM N18 casting and remanufactured to SneedSpeed standards, every cylinder head is carefully inspected, machined, assembled, and verified before it leaves our facility.

This isn't a junkyard cylinder head. It isn't an unknown rebuild. It's a properly remanufactured component built by a company that specializes in MINI powertrain systems.

Why N18 Cylinder Heads Fail

The N18 is one of MINI's most reliable turbocharged engines, but like any performance engine, mileage, heat, and wear eventually take their toll.

Common cylinder head failures include:

• Bent valves caused by timing chain failures

• Burned exhaust valves

• Valve seat leakage

• Excessive oil consumption

• Worn valve guides

• Overheating damage

• Warped deck surfaces

• Cracked castings

• Loss of compression

When these issues occur, replacing the cylinder head is often the most reliable and cost-effective repair.

Built for Street and Performance Use

The factory N18 cylinder head is a strong design capable of supporting both stock and modified applications.

For that reason, SneedSpeed focuses on restoring the cylinder head to proper operating condition rather than introducing unnecessary modifications that can compromise drivability or long-term reliability.

The result is a cylinder head that supports:

• Daily-driven vehicles

• Stock turbo systems

• Upgraded turbo systems

• Performance ECU calibrations

• Long-term street reliability

• Future performance upgrades

Whether you're maintaining a factory MINI Cooper S or building a higher-performance street car, this cylinder head provides the airflow and durability needed to support your goals.

Remanufactured to SneedSpeed Standards

Every cylinder head undergoes a comprehensive remanufacturing process designed to restore reliability and performance.

Each assembly receives:

• OEM N18 cylinder head casting

• Complete cleaning and inspection

• Pressure testing for cracks and leaks

• Precision-machined deck surface

• Valve guide inspection and correction as required

• New valve stem seals

• Valve inspection and reconditioning

• Seat inspection and correction as required

• Complete assembly and final quality inspection

The result is a cylinder head built to restore proper compression, improve sealing, reduce oil consumption, and provide long-term durability.

Why Choose SneedSpeed?

At SneedSpeed, we specialize in MINI powertrain systems.

For more than 20 years, we've built, raced, tuned, and repaired MINI engines at every level—from daily drivers to championship-winning race cars.

We understand the common failure points, the machining standards required for reliability, and the details that separate a quality rebuild from a future problem.

Our philosophy is simple:

If we wouldn't run it on our own engines, we don't sell it.

That commitment is built into every cylinder head we produce.

Ideal For

• Failed timing chain repairs

• Burned valve repairs

• Oil consumption issues

• High-mileage engine refreshes

• Engine rebuild projects

• Stock replacement engines

• Performance street builds

• Preventative top-end restoration

Vehicle Applications

Fits MINI Cooper S models equipped with the N18 engine:

• 2011–2014 R55 Clubman S

• 2011–2013 R56 Hatchback S

• 2011–2015 R57 Convertible S

• 2011–2015 R58 Coupe S

• 2012–2015 R59 Roadster S

• 2011–2016 R60 Countryman S

What's Included

• Fully assembled remanufactured N18 cylinder head assembly

• Valves installed

• Valve springs installed

• Retainers installed

• Valve stem seals installed

• Ready for installation

The Foundation of Every Reliable N18

Horsepower starts with fundamentals.

A leaking valve, warped deck surface, or worn-out cylinder head can limit performance, reduce reliability, and turn a simple repair into an expensive failure.

The SneedSpeed N18 Remanufactured Cylinder Head Assembly gives your MINI the properly rebuilt foundation it needs so you can spend less time repairing problems and more time enjoying the drive.