B48 MINI S SneedSpeed Crate Engine

B48 SneedSpeed Crate Engine

Street · Super Sport · Race

The B48 SneedSpeed Crate Engine is a fully assembled long block replacement engineered by SneedSpeed for F-series MINI Cooper S models equipped with the turbocharged B48 engine. It is designed for owners who want to eliminate common factory weak points and install a proven, purpose-built foundation matched to how the car is actually used.

Depending on configuration and supporting modifications, expected output ranges from approximately 220–260 wheel horsepower in Street form, 300–350 wheel horsepower in Super Sport form, and 400+ wheel horsepower in Race form, with power capability governed by airflow, fueling, turbocharger selection, and calibration rather than short-block limitations.

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 B48 SneedSpeed Crate Engine is offered in three configurations:

• Street

• Super Sport

• Race

Each level is engineered intentionally. The differences are driven by internal component specification, valvetrain strategy, and airflow capability—not marketing labels.

Each tier exists for a specific use case.

Core Assembly Standards (All Builds)

Every B48 SneedSpeed Crate Engine is assembled to the same baseline quality and validation standards:

• Fully rebuilt B48 aluminum engine block

• New pistons, rings, bearings, gaskets, and seals

• Balanced rotating assembly

• Corrected known B48 wear and failure points

• SneedSpeed assembly, clearance, and inspection standards

• Fully assembled long block, ready for installation

All engines are built for durability, thermal stability, and repeatability under real-world street and track conditions.

Build Levels Explained

Street Series — OEM+ Reliability

The Street build is designed for daily-driven vehicles and lightly modified applications where longevity, smooth operation, and factory-like 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 B48 platform and is ideal for stock vehicles, mild tuning, and long-term daily use.

Super Sport Series — Street & Track Balance

The Super Sport build is engineered for performance-focused street cars and mixed street/track use where higher load capacity and responsiveness are required.

• Forged pistons

• Forged connecting rods

• Remanufactured, unported cylinder head

• OEM camshaft profile

• Performance valve springs matched to Super Sport cam specifications

• Strong midrange torque and broad, usable powerband

This build supports significantly increased boost and sustained load while retaining excellent street manners.

Race Series — Maximum Output & RPM Capability

The Race build is designed for aggressive tuning, high-RPM operation, and track-focused use where airflow and valvetrain control are critical.

• Forged pistons

• Forged connecting rods

• SneedSpeed remanufactured and ported cylinder head

• OEM camshaft profile

• Performance valve springs matched to Race cam specifications

• Increased airflow and high-RPM volumetric efficiency

The Race engine shares the same forged bottom end as the Super Sport build, with performance differentiation coming from head work, camshaft profile, and valvetrain strategy.

Build Comparison Overview

Applications

• F-series MINI Cooper S equipped with the B48 turbocharged engine

• Direct long block replacement

• Performance street builds

• Track and competition vehicles