R56 N14 MINI Cooper S / JCW engine rebuild kit

R56 N14 MINI Cooper S / JCW Engine Rebuild Kit

Street · Super Sport Foundation · Upgrade Ready

The R56 N14 Engine Rebuild Kit from SneedSpeed is a comprehensive engine overhaul solution engineered for R56 MINI Cooper S and JCW models powered by the turbocharged N14 engine. This kit bundles all essential bottom-end and top-end wear components into a single package, providing a turnkey platform for restoring reliability, refresh performance, and laying the groundwork for future power upgrades.

One Kit — Multiple Pathways

This rebuild kit is more than a collection of wear parts — it is the foundation of a strategic build path. Designed to support a broad range of use cases, it can be configured for:

• OEM-level engine refresh (Street reliability)

• Performance-oriented street builds

• Preparation for Super Sport upgrades (stronger internals and higher output tuning)

The kit’s modular options allow you to trade up without starting from scratch, saving time and cost while ensuring consistent part quality and fitment.

Core Components (Standard Kit)

The base kit includes the critical components needed to complete a professional rebuild and restore compression, sealing, and rotation integrity:

• Pistons and piston rings in selected sizing

• Main and rod bearings

• Head gasket

• Gaskets and seals

• Timing chain and tensioner components

• Head bolts or stud upgrade option

• Rod bolts

• Cryo-hardened timing chain kit

Each part is engineered to fit precisely and work together, eliminating fitment guesswork and saving you from piecing incompatible parts together.

Performance & Upgrade Options

This rebuild kit is uniquely configurable to meet your goals:

Piston & Ring Options

• Street Series — durable, direct replacement for stock bore

• Forged Race Series — performance-ready piston upgrade

Bearing Options

• Street Series bearings — OEM-equivalent durability

• Black Magic Performance coated race bearings — improved load handling for higher power or extended high RPM use

Head Gasket & Fastener Options

• Street head gasket — OEM-fit sealing

• Performance head gasket — thicker/multi-layer designs for higher loads and boostenvironments

• Stock bolts or head stud upgrades — studs improve clamping reliability for high boost builds

Rod Bolt Options

• Street rod bolts — OEM replacement

• Performance rod bolts - higher reliability under higher boost for stock rods

Timing Chain Upgrade

• Cryo hardened timing chain kit — improved durability and reduced chain stretch over the OE chain

Why This Kit Matters

Restores Engine Health

A complete rebuild restores lost compression, tightens clearances, and replaces worn timing and sealing components — eliminating common N14 failure points and improving drivability.

Designs for Higher Output

Selecting forged pistons and performance bearings leaves room for more aggressive tuning and higher boost levels without compromising bottom-end strength.

Scales With Your Build

The modular nature of the kit allows you to start with a street refresh and then trade up to stronger internals, head studs, and supporting mods as your performance goals evolve.

Reduces Rebuild Complexity

Engineering all components to work together removes the risk of mismatched parts, ensuring a smoother assembly process whether performed in a shop or garage setting.

Ideal Applications

• Engine refresh on worn or high-mileage N14 engines

• Rebuild prior to performance tuning

• Street performance builds with future upgrade potential

• Baseline for big-turbo or high-boost projects

• R56 N14 Engine Rebuild Kit — Configuration Comparison

  Category	Street	Super Sport Foundation	Race-Ready Base
  Intended Use	Reliable OEM-plus rebuild	Performance street & foundation for upgrades	High-load and high-boost builds
  Pistons	Cast, OEM-equivalent	Forged (stronger stock size)	Forged (std or oversize, race tolerances)
  Piston Rings	Street/standard rings	Performance	Performance
  Piston Size	STD / oversize options	STD / oversize	STD or oversize
  Connecting Rods	OEM-type	Forged	Forged
  Rod Bearing Set	Street spec	Race spec	Race spec
  Main Bearing Set	Street spec	Race spec	Race spec
  Head Gasket	OEM-equivalent	Performance multilayer steel	Performance multilayer steel
  Head Fasteners	Stock bolts	Stud kit	Stud kit
  Timing Chain Components	Standard timing chain	Cryo hardened chain kit	Cryo hardened chain kit
  Valve Train	OEM cam timing	Performance Springs and Cams	Race Springs and Cams (use with ported head)
  Compression Restoration	Stock 10.5 to 1	10.0 to 1	10.0 to 1
  Durability Under Load	Street & mild performance	Elevated street and track performance	Race Spec
  Best For	Daily drivers, stock or mild ECU tuning	Performance street or track will future upgrades	High-boost, race prep, big-turbo readiness