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KLM RACE // ENGINE BUILD

KLM B58 Stage 4 SAVAGE Engine Build (1,500 WHP)

$26,999.99

You will receive an email after placing this order to confirm freight and final shipping cost.

If you're building a Stage 4, we already know what you're doing. This is drag car territory, or you're chasing a number most B58 owners will never see. This is our peak build, the one we throw everything at because anything less won't survive what you're about to put it through. Displacement moves to a 3.2L stroker as standard, not an add-on. Pistons are KLM Custom Spec, made to our own spec, not a catalog part with a rating stamped on the box. The head gets our KLM Spec modification, welding and machining to reinforce it beyond what the casting can handle stock, on top of the same 5-axis CNC porting from Stage 3. At 1,500 plus whp, the head has to survive just as hard as the bottom end.

Send us your engine or buy a core from us and we build the whole thing start to finish. Either way it comes back ready to run once it's through break-in.

Key Specs
Rated for 1,500+ WHP. Our own shop car and several customer builds are currently running in the 1,600 whp range on this spec.
This is our current peak build level. No stage above this exists.
Every build follows our researched and validated Stage 4 spec. Individual engines are not dyno tested.
Break-in period required. Instructions included with every build.
Send in your own engine or purchase a core from KLM for a complete build.
Turnaround is typically 3 to 4 weeks, occasionally longer depending on parts availability and build queue.

Configuration

Complete the Build

Quantity

Total $0.00

What's Included

Built to Dominate Every Stage

Every KLM engine build is assembled in-house with race-validated components

  • KLM Custom Spec HD pistons

  • BC 3.2L stroker kit

  • King main bearings

  • ACL rod bearings

  • oversized ARP head studs with block machined in-house to fit

  • Kelford/GSC cams

  • GSC intake and exhaust valves

  • GSC valve springs and retainer kit

  • GSC valve stem seals

  • BMW OEM main seals

  • KLM Spec fire-ring head gasket with block machined in-house for the seal

  • 5-axis CNC ported head and full valve job done in-house

  • KLM Spec cylinder head modification, welded and machined in-house to reinforce the head beyond stock

FAQ

Common Questions

Have more questions? Contact our engine specialists.

Each stage builds on the one before it with stronger internals and additional machine work. Stage 1 is up to 1,000 WHP, Stage 2 is up to 1,200 WHP, Stage 3 is up to 1,300 WHP, and Stage 4 SAVAGE is 1,500+ WHP. See the stage comparison page for a full breakdown of what's included at each level.

PLACEHOLDER, confirm the real answer with the team before publishing.

PLACEHOLDER, confirm the real answer with the team before publishing.

PLACEHOLDER, confirm the real answer with the team before publishing.

PLACEHOLDER, confirm the real answer with the team before publishing.