The EMSCauto N14 Engine Rebuild Kit is a configurable rebuild package for R55, R56, R57, R58, and R59 MINI Cooper S / JCW models equipped with the N14 turbocharged engine. Built for everything from a dependable stock-style refresh to a more serious performance or track-focused engine build, this kit allows you to choose the piston, bearing, gasket, fastener, and timing components that best fit your engine condition, power goals, and intended use.
Whether you are repairing a worn high-mile N14, correcting common timing and wear issues, or building a stronger bottom end for higher boost and harder use, this kit helps you assemble the right combination of parts without guessing. EMSCauto offers proven component options from trusted names including SneedSpeed, ARP, CP, King, and Wiseco, giving you the flexibility to match the build to the car instead of forcing a one-size-fits-all package.
From daily driver rebuilds to aggressive performance builds, this kit gives MINI owners and engine builders a better starting point for restoring compression, improving durability, and building a stronger long-term foundation.
Build Path Options
| Build Path | Recommended Setup |
|---|---|
| Street Refresh | Rings Only STD size or conservative piston option, Street Series bearings, Street head gasket, bolts, no rod bolt upgrade unless needed, SneedSpeed Cryo Hardened Timing Chain Kit, bearing size based on crank measurements |
| Light Performance | Forged Race Series STD or .5mm overbore, Performance Coated bearings, Performance head gasket, Sneed Studs or ARP Studs, ARP rod bolts, SneedSpeed Cryo Hardened Timing Chain Kit, bearing size based on machine shop spec |
| Track Day | Forged Race Series, CP, or Wiseco pistons in STD or .5mm as required, Performance Coated or King Race Rod and STD Mains, Performance or Cometic head gasket, Sneed Studs or ARP Studs, ARP rod bolts, SneedSpeed Cryo Hardened Timing Chain Kit, bearing size based on final crank machining |
| Race Spec | CP, Wiseco, or Forged Race Series pistons in STD or .5mm, King Race Rod and STD Mains or equivalent aggressive bearing strategy, Cometic head gasket, ARP Studs or Sneed Studs, ARP rod bolts, SneedSpeed Cryo Hardened Timing Chain Kit, bearing size based strictly on final crank measurements |
Which Build Is Right for You?
| Best For | Pistons | Bearings | Head Gasket | Head Fasteners | Rod Bolts | Timing Chain | Bearing Size | Summary |
|---|---|---|---|---|---|---|---|---|
| Street Refresh | Daily drivers, tired engines, stock or near-stock rebuilds | Rings Only STD size if pistons are reusable, or conservative street piston option based on bore condition | Street Series | Street | Bolts | None unless build justifies upgrade | SneedSpeed Cryo Hardened | Based on crank measurements: STD, .25mm under, or .5mm under |
| Light Performance | Tuned street cars, bolt-on N14 builds, stronger weekend cars | Forged Race Series STD or .5mm overbore as required | Performance Coated | Performance | Sneed Studs or ARP Studs | ARP | SneedSpeed Cryo Hardened | Based on machine shop spec |
| Track Day | HPDE, autocross, repeated hard use, sustained RPM and heat | Forged Race Series STD / .5mm, CP STD / .5mm, or Wiseco STD / .5mm based on bore size and brand preference | Performance Coated or King Race Rod and STD Mains | Performance or Cometic | Sneed Studs or ARP Studs | ARP | SneedSpeed Cryo Hardened | Based on final crank machining |
| Race Spec | Competition builds, track-only cars, max-effort N14 engines | CP STD / .5mm, Wiseco STD / .5mm, or Forged Race Series STD / .5mm depending on bore size and build strategy | King Race Rod and STD Mains or most aggressive bearing strategy appropriate to the build | Cometic | ARP Studs or Sneed Studs | ARP | SneedSpeed Cryo Hardened | Based strictly on final crank measurements |
