R53 SneedSpeed Crate Engine

R53 SneedSpeed Crate Engine
Street · Super Sport · Race

The R53 SneedSpeed Crate Engine is a fully assembled long block replacement engineered by SneedSpeed for R52–R53 MINI Cooper S models equipped with the supercharged W11 engine. It is designed for owners who want to eliminate recurring engine failures and install a proven, purpose-built foundation matched to how the car is actually driven.

This is not a collection of parts. It is a complete engine system built around a clear progression path—allowing customers to trade up in performance without guesswork or unnecessary replacement.

One Engine Program — Three Performance Levels

The R53 SneedSpeed Crate Engine is offered in three configurations: Street, Super Sport, and Race.
Each tier is engineered intentionally, with differences clearly defined by internal component specification and airflow strategy.

This is not marketing tiering. Each level exists for a specific use case.

Core Assembly Standards (All Builds)

Every R53 SneedSpeed Crate Engine is assembled to the same quality and validation standards:

Fully rebuilt W11 engine block
New pistons, rings, bearings, gaskets, and seals
Balanced rotating assembly
Corrected known W11 wear and failure points
SneedSpeed assembly, clearance, and inspection standards
Fully assembled long block, ready for installation

All engines are built for durability and repeatability under real-world use.

Build Levels Explained

Street Series — OEM+ Reliability

The Street build is designed for daily-driven vehicles and lightly modified applications where reliability and drivability are the priority.

OEM-type pistons
OEM-type connecting rods
Remanufactured, unported cylinder head
Street camshaft profile
Stock-spec valve springs
Smooth idle and factory-like behavior

This configuration provides a clean, dependable reset of the R53 platform and is ideal for stock or mild pulley and intake setups.

Super Sport Series — Street & Track Balance

The Super Sport build is engineered for performance-focused street cars and mixed street/track use.

Forged pistons
Forged connecting rods
Remanufactured, unported cylinder head
Super Sport camshaft profile
Performance valve springs matched to Super Sport cam specifications
Strong midrange torque and broad, usable powerband

This build supports significantly higher load, RPM, and boost levels while retaining excellent street manners and drivability.

Race Series — Maximum Output & RPM Capability

The Race build is designed for sustained high-RPM operation and aggressive track use.

Forged pistons
Forged connecting rods
SneedSpeed remanufactured and ported cylinder head
Race camshaft profile
Performance valve springs matched to Race cam specifications
Increased airflow and high-RPM volumetric efficiency

The Race engine uses the same forged bottom end as the Super Sport build, with performance differentiation coming from airflow and valvetrain strategy.

Applications

• R52–R53 MINI Cooper S with W11 supercharged engine
  Direct long block replacement
  Performance street builds
  Track and competition vehicles