VAC Motorsports S63 4.8L Stroker Kit for BMW | 2000HP Capable

⏱️ Build Time & Shipping
This stroker kit is built to order and has an estimated shipping lead time of 6–9 weeks after the order is placed. 🚚

The VAC Motorsports BMW S63 4.8L Stroker Kit is engineered for extreme performance builds. Designed for the BMW S63 / S63TU / N63 platform, this kit increases displacement from 4.4L to 4.8L, delivering massive gains in torque, turbo efficiency, and horsepower potential.

Each kit is precision-machined from premium 4340 billet steel, dynamically balanced for high-RPM stability, and paired with CP-Carrillo forged pistons for exceptional durability under extreme boost and racing conditions.

With the proper engine build, tuning, and supporting modifications, this stroker kit can support 1,000–2,000+ horsepower builds, making it the perfect foundation for high-boost, ethanol, or race-fuel applications.

Why It Works

• Increased displacement improves mid-range torque and turbo response
• 4340 billet steel crankshaft handles extreme load and high boost
• Forged aluminum pistons provide superior strength and heat resistance
• Precision balancing ensures smooth high-RPM performance and reliability

Technical Specifications

Platform Compatibility

BMW S63 / S63TU / N63

Common applications include:

• F10 / F90 M5
• F12 / F13 M6
• F85 / F86 X5M / X6M
• G15 / G16 M8
• Other S63/N63 variants with proper calibration

Displacement

Stock: 4.4L (4395 cc)
VAC Stroker: 4.8L (~4765 cc)
Increase: ~8% displacement gain

Crankshaft

Material: 4340 Billet Steel
Stroke: 94 mm (OEM approx. 89 mm)

Manufacturing Process:
• Fully CNC machined
• Shot peened
• Nitrided surface treatment
• Micropolished journals

Balance: Dynamically balanced within 1 gram tolerance

Pistons

Manufacturer: CP-Carrillo Forged Aluminum

Specifications:

• Bore: 89 mm (no sleeves required)
• Compression Ratio: 10.5:1
• Lightweight slipper-skirt design
• CNC machined dome for improved combustion efficiency
• DLC coated wrist pins
• Performance piston ring set included

Connecting Rod Options

Manley H-Tuff Rods

• Rated up to 1,000 HP
• Up to 8,500 RPM

CP-Carrillo Pro-Xtreme Rods

• Rated up to 2,000 HP
• Up to 9,500 RPM

Performance Benefits

• Supports builds up to 2,000 HP with proper tuning
• Significant improvement in torque and turbo spool
• Increased displacement improves overall engine efficiency
• Ideal for high-boost, ethanol (E85), or race fuel builds

What’s Included

• 1 × 4340 Billet Crankshaft (94 mm stroke)
• 8 × CP-Carrillo Forged Pistons (89 mm bore, 10.5:1 compression)
• DLC wrist pins and performance ring set
• 8 × Connecting Rods

• Manley H-Tuff or

• CP-Carrillo Pro-Xtreme