Modified BMW M10 Engine & Getrag 5-Speed Gearbox | Metric Mechanics “2400 Rally Engine” | E30 M3 Evo-Inspired | Rebuilt & Proven
Offered here is a highly modified BMW M10 inline-four engine paired with a Getrag 245 five-speed manual gearbox, meticulously rebuilt and engineered for performance, reliability, and track-ready driving. Originally rebuilt by Metric Mechanics as a “2400 Rally Engine”, this unit was acquired by the seller in October 2020 and has been installed in a 2002 BMW 2002 shop car.
This M10 incorporates rare motorsport-inspired upgrades, combining E30 M3 Evo 2.5L-style internals, precision machine work, and performance-focused components that make it ideal for restoration, rally builds, or performance conversions.
Technical Specifications
| Specification | Details |
|---|---|
| Engine Code | BMW M10 Inline-Four (Modified) |
| Displacement | 2.4 Liters (E30 M3 Evo 2.5L-style crank installed) |
| Configuration | Inline-4, Naturally Aspirated |
| Block Material | Cast Iron |
| Cylinder Head | Aluminum, SOHC, Hand-Ported |
| Valvetrain | Single Overhead Camshaft (SOHC) with dual valve springs, stainless-steel valves, revised rocker arms |
| Crankshaft | E30 M3 Evo-style 87mm forged crank |
| Camshaft | Ireland Engineering billet 302 cam |
| Timing | Single-row timing chain |
| Rod Bearings | Tri-metal |
| Valve Guides | Manganese bronze |
| Oil Pan | Baffled, with blueprinted oil pump & bronze pressure relief valve |
| Induction | Ireland Engineering intake manifold, dual Weber 40 DCOE carburetors |
| Exhaust | Ireland Engineering custom header |
| Transmission | Getrag 245 5-speed manual |
| Drivetrain | Rear-Wheel Drive |
| Mileage | ~1,700 miles (1,500 post-rebuild + ~200 installed in shop car) |
| Condition | Excellent, fully run-in and tested |
Included Components
Metric Mechanics Rebuilt M10 Engine
Cast-iron block with SOHC aluminum head
Hand-ported cylinder head
E30 M3 Evo 2.5L-style crank
Billet camshaft, dual valve springs, stainless-steel valves
Ancillary Components
Baffled oil pan with blueprinted pump & bronze relief valve
Manganese bronze valve guides, tri-metal rod bearings
Revised rocker arms
Intake manifold (Ireland Engineering)
Dual Weber 40 DCOE carburetors
Exhaust header (Ireland Engineering)
Distributor, oil sump, fan, and water pump
Getrag 245 5-Speed Manual Gearbox
Includes shifter assembly and linkage
Installed and tested with engine
Condition Notes
Rebuilt by Metric Mechanics with rally-grade components
~1,500 miles added post-rebuild, ~200 miles in seller’s 2002 shop car
Engine runs flawlessly, smooth revs, responsive throttle from Weber carbs
Stored indoors when not in use
All modifications documented with invoices and build notes
Ready for track, rally, or period-correct performance builds
Fitment & Applications
BMW 2002 (E10) – Performance / Rally Builds
Suitable for E21/E30 vintage swaps or modified classic projects
Perfect for track-prepped vintage racing, rally-spec builds, or custom restorations
Ideal for collectors seeking a numbers-matching style engine with modern performance upgrades
Collector & Performance Significance
This M10 “2400 Rally Engine” is a unique combination of classic BMW engineering and motorsport tuning. Metric Mechanics’ work incorporated E30 M3 Evo-style internals, hand-ported heads, and precision components to deliver a high-revving, reliable, and spirited inline-four.
Paired with the Getrag 245 manual gearbox, this package delivers authentic M10 performance with modern rally-grade reliability, making it a standout choice for BMW enthusiasts, collectors, and racers.
Metric Mechanics Modified BMW M10 Engine & Getrag 245 5-Speed Manual Gearbox — an exceptional rally-grade rebuild with ~1,700 miles, featuring E30 M3 Evo-style crank, hand-ported SOHC head, dual Weber DCOEs, and performance ancillaries.
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