SHOP ENGINE MECHANICAL ESSE WERKS BUILT S58 LONG BLOCK — SLEEVED, 800–...
Esse Werks Built S58 Long Block — Sleeved, 800–1400 WHP Capable — xDrive G80 M3 / G82 M4 (+ Bonus RKA Billet Intake)
ESSE WERKS

Esse Werks Built S58 Long Block — Sleeved, 800–1400 WHP Capable — xDrive G80 M3 / G82 M4 (+ Bonus RKA Billet Intake)

$17,449.00

A complete, never-fired S58 long block, built by Esse Werks and orphaned when its project ended mid-build. Zero miles, never run. Finished to spec, then shelved — so it is listed well under what is in it.

This is the foundation for a serious S58: sleeved, fire-ringed, oversized-studded, with a full CNC-ported head and GSC valvetrain. The hardware window is real — 800–1400 WHP across a 4,500–8,500 RPM range. Build the turbo and fueling around it and it will hold what you ask of it.

The build

  • Sleeved S58 block — ductile-iron sleeves for high-boost cylinder pressure
  • CP forged pistons with HD wrist pins
  • Forged connecting rods
  • Fire-ringed / O-ringed deck — sealed for big power
  • ARP oversized 625+ head studs with custom inserts
  • Full CNC-ported cylinder head
  • GSC valves and springs — fresh valvetrain
  • GSC S2 camshafts — 284°/288° advertised, 240°/242° at .040", 10.2 / 10.8 mm lift, integrated intake cam trigger
  • Balanced rotating assembly, blueprinted and assembled

Value

Documented build cost is over $32,000 in parts and machine work; a comparable turnkey build runs $34,000-plus. This one is listed at roughly half that — and it ships with a bonus RK Autowerks billet port-injection intake manifold ($5,000) included at no charge, putting the effective discount at ~50%. One only. When it sells, the listing comes down.

Fitment

Configured for xDrive G80 M3 / G82 M4 — oil pan and pickup are chassis-specific. RWD M3/M4 and F97 X3 M / F98 X4 M buyers: confirm pan and pickup for your application before purchasing.

Included

Complete assembled long block — sleeved block and CNC-ported head — plus the bonus RK Autowerks billet port-injection intake.

Not included

Turbochargers, fuel system and injectors, charge piping, exhaust manifolds, sensors and wiring, accessory drive, ECU/tune. Bring your bolt-ons and calibration.

Never fired, fully documented, ready to crate for freight. For condition details or a freight quote ($450 to lower 48 states), reach us at commerce@essewerks.com.

Category Engine Mechanical
Manufacturer Esse Werks

Ships from Boca Raton, FL.

WHY WE BUILT ESSE WERKS
We started Esse Werks because the cars we cared about were stuck between two bad options - a dealer that treated any modification as a problem, and a parts catalog that sold you a box and wished you luck. We wanted a shop that logs the car, builds the calibration to match, and stands behind the result the way an engineer stands behind a number. That gap is the whole reason we exist, and it is why every part we ship and every tune we write has to earn its place on the car. When you buy from us, you are buying the shop's judgment, not just the part in the box.