KLM Race S55 Engine Build (1,000 WHP)

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

Engine core is not included. You will need to supply a healthy core.

This is our build for anyone pushing an S55 past what the factory internals were ever built to survive. Your engine comes apart down to the bare block and goes back together fresh. Forged pistons built to our spec handle the power, and the rest of the engine is rebuilt with brand new genuine BMW hardware. No used parts, nothing reconditioned, nothing that was already in there goes back in if it wears. It is built to safely support tuning up to 1,000 WHP, not a promise that your engine makes 1,000 WHP out of the box. That number is a ceiling, and we build with margin above it on purpose.

Send us your engine and we build the whole thing start to finish. It comes back ready to run once it's through break-in.

Key Specs

Rated to safely support tuning up to 1,000 WHP.
Forged pistons to KLM spec with brand new genuine OEM components throughout the rest of the build.
Every build follows our researched and validated S55 spec. Individual engines are not dyno tested.
Break-in period required. Instructions included with every build.
Send in your own engine for a complete build.
Turnaround is typically 3 to 4 weeks, occasionally longer depending on parts availability and build queue.