• Complete stroker kit by BimmerHeads for BMW M20 engines shown with CP pistons and ACL bearings.
  • Custom forged CP pistons for BMW M20 engine
  • Set of 6 Molnar H-Beam connecting rods with ARP hardware for BMW M20, S50, and S52 engines.
  • Stroker sleeve for BMW M20 engine shown with optional washer.
  • A set of ACL Race Series main bearings for BMW M20, S50, and S52 engines, displayed in front of its packaging box.
  • A set of ACL Race Series connecting rod bearings for BMW M20, S50, and S52 engines displayed in front of its packaging which reads 'Performance Engine Bearings'.
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M20 Stroker Kit

M20 Stroker Kit

$2,410.00 USD
$2,410.00 USD
Sale Sold Out
Shipping Calculated At Checkout.
Kit Size & Main Bearing Style
Molnar H-Beam Connecting Rods
Turbo Piston Upgrade

The BimmerHeads M20 Stroker Kit comes from 15 years of building M20 engines in our own shop — more stroker builds than we can count, and a clear sense of what works. Available in 2.8L, 2.9L, 3.0L, and 3.1L for early (1987 and older) and late (1988 and newer) M20 blocks.

Not sure which M20 block you have? Our M20 Bearing Differences page shows you how to check the main bearing cap and determine whether your block is early or late before ordering.

Every kit includes:

  • CP-Carrillo 2618-T1 forged piston set with laser-engraved BimmerHeads logo — pistons, wrist pins, piston ring set, and wrist pin clips. Our go-to forged piston for the M20
  • Reconditioned original BMW crankshaft (2.8L) or forged original BMW crankshaft (2.9L and larger) — every crankshaft cleaned, inspected, and micro-polished
  • Crankshaft seal adapter sleeve, OEM crankshaft bolt, and machined washer (2.9L and larger)
  • ACL Race main and connecting rod bearing sets — the bearings we spec on every in-house M20 build

Kit specs:

  • 885 cylinder head casting
  • 10:1 compression ratio
  • 85mm bore size
  • 135mm rod length

Every kit is built to these specs unless you specify otherwise in your checkout notes. Customization is available at no charge. Compatible with Molnar H-Beam, OEM M20B25, and OEM S50/S52 connecting rods.

Kit upgrades:

  • Molnar H-Beam connecting rods — 4340 billet, ARP2000 hardware, ±.0001" tolerances, USA-made. Standard or Power Adder versions available at a discounted rate when added to this kit
  • Turbo piston upgrade — heavier-duty piston casting with upgraded rings and wrist pins for forced induction builds

Combine this kit with a Super Sport 885 Cylinder Head or Race 885 Cylinder Head for a complete high-performance M20 build.

Each kit is built to order — no cancellations are accepted once placed. Allow a minimum of 6–8 weeks production time. Have questions before ordering? Contact us — we're happy to help you configure the right kit.

This is the kit we spec for ourselves. Every crankshaft micro-polished, every bearing set hand-selected, every component inspected before it ships. If it doesn't meet our standard, it doesn't leave our shop.

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