CP Forged Piston Set, BMW S63 Alusil, Pro-Xtreme




The BMW S63 is a 4.4-liter V8 Twin Turbo engine that is used in various high-performance BMW models, including the M5 and M6.

The S63 uses an Alusil engine block. Alusil is a proprietary material used by BMW that is a combination of aluminum and silicon. The aluminum provides the strength and light weight required for the engine block, while the silicon provides a hard and durable surface that can withstand the friction and heat of the engine.
That being said, our 5150 / CP Carrillo Design is the best solution. Our pistons are made with:

  • HD forging 
  • Handle high cylinder pressures
  • Rated for 2000HP
  • PD14 coating to ensure OEM block compatibility

Alusil engine blocks are a good choice for high-performance engines like the S63, as they offer a balance of strength, weight, and heat dissipation. However, it is crucial to ensure piston compatibility, as the factory cylinders can NOT be bored or honed due to the specialized nature of the Alusil coating. PD14 piston coating ensures that the piston will not cause premature wear to the OEM cylinder lining and allows the piston to travel smoothly within the cylinder.

If you are considering upgrading to forged pistons, then, there are a few things you should know.

Forged pistons are made from high-strength materials, such as aluminum or HD Forging, that have been forged under high pressure and heat to create a very strong and durable component. This allows them to withstand higher levels of heat and pressure than cast pistons, which can help improve engine performance and reliability.

However, it is important to note that upgrading to forged pistons typically requires additional modifications to the engine, such as upgraded connecting rods and bearings, as well as careful tuning to ensure proper engine performance and reliability. It is also important to work with a reputable engine builder or tuner to ensure that the parts are properly installed and tuned for your specific application.

Additional information

Weight 22 lbs
Dimensions 26 × 12 × 7 in
Bore Size

89 mm, 89.25 mm

Compression Ratio

9.5:1, 10:1, 10.5:1, 11:1


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