Spool Performance Mercedes M157 Forged Engine Build

Unlock extreme horsepower and uncompromising reliability with the Spool Performance M157 Forged Engine Build for Mercedes-AMG vehicles. Designed for enthusiasts and high-performance tuners, this engine eliminates the common cylinder scoring issues of the M157 platform while supporting up to 1500 horsepower.

The heart of this build features Darton Mid Sleeves, providing reinforced cylinder walls to handle extreme power levels and maintain long-term durability. Complementing this are fully forged pistons and rods, engineered in collaboration with Italian RP, delivering exceptional strength and reliability under high-stress conditions.

Spool Performance upgrades the engine with custom ARP head studs, time-Darton Mid sleeves, ARP main bolts, and ARP rod bolts, allowing for higher torque head assembly and engine durability. Precision cylinder and crank bores finished to .0001" tolerance, along with upgraded main and rod bearings, ensure a perfect fit and smooth operation at all times.

LongBlock builds additionally include port and polish, custom camshafts, and a full head rebuild to maximize airflow and performance. This engine is ideal for enthusiasts seeking both extreme power and long-term reliability in a high-performance AMG application.

Note: A rebuildable core is required. Cores can be supplied for an additional $11,000 fee.

FITMENT
Mercedes-Benz AMG S63 / S65 (M157) (2012-2018)
Mercedes-Benz AMG E63 / E63 S (M157) (2013-2018)
Mercedes-Benz AMG CLS63 (M157) (2012-2018)
Mercedes-Benz AMG G63 (M157) (2012-2018)
Designed for M157 5.5L Biturbo V8 engine applications

Key Features

• Spool Performance M157 Forged, Darton Sleeved 1500HP Engine Build
• Eliminates common M157 cylinder scoring issues
• Darton Mid Sleeves for reinforced cylinder walls
• Forged pistons and rods developed with Italian RP
• Custom ARP head studs, main bolts, and rod bolts for high torque applications
• Cylinder and crank bores finished to .0001" tolerance
• Upgraded main and rod bearings for maximum reliability
• LongBlock option includes port & polish, custom camshafts, and head rebuild
• Engine engineered for extreme horsepower and durability