CP Pistons SC7705-6 Forged Piston Set for 2019-2025 BMW B48 / Toyota B58 3.0L I6

Vehicle Fitment

• 2019-2025 BMW Z4 (G29) / X3 / X4 / 3-Series / 4-Series (B48 2.0L I4, turbocharged, RWD/AWD)
• 2019-2025 Toyota GR Supra (A90/A91) (B58 3.0L I6, turbocharged, RWD)

Fitment Notes

• Requires internal engine block and head in B48/B58 spec - not compatible with N series engines.
• Compatible with stock bore (82.00 mm) and standard stroke set-ups in B48 and B58 families.
• May require machining or polishing in performance builds; check valve clearance.

Features

• Forged 2618 aluminum for high strength and elevated heat tolerance.
• Bore size 3.2283 in (≈82.00 mm), matching factory dimensions of B48/B58 engines. :contentReference[oaicite:0]{index=0}
• Compression Ratio (CR) of 11.0:1 for improved output in turbo/time builds. :contentReference[oaicite:1]{index=1}
• Full ring package included (CPT-3328PVD rings) for effective sealing. :contentReference[oaicite:2]{index=2}
• Includes wrist pins and locks for complete installation. :contentReference[oaicite:3]{index=3}
• Compatible with performance turbocharging and high-boost applications. :contentReference[oaicite:4]{index=4}
• Lightweight design reduces reciprocating mass, improving transient response. :contentReference[oaicite:5]{index=5}
• Precision CNC machined surfaces and tight tolerances for consistency across all six pistons. :contentReference[oaicite:6]{index=6}

Specifications

• Bore Size: 82.00 mm (3.2283 in) :contentReference[oaicite:7]{index=7}
• Stroke: 94.6 mm (for B58) :contentReference[oaicite:8]{index=8}
• Connecting Rod Length: 148 mm :contentReference[oaicite:9]{index=9}
• Compression Ratio: 11.0:1 :contentReference[oaicite:10]{index=10}
• Pin Diameter: 22 mm :contentReference[oaicite:11]{index=11}
• Compression Height: 33.25 mm :contentReference[oaicite:12]{index=12}
• Ring Set: CPT-3328PVD, thicknesses approx 1.2 / 1.2 / 2.0 mm :contentReference[oaicite:13]{index=13}
• Piston Material: 2618 forged aluminum alloy :contentReference[oaicite:14]{index=14}

Included Components

• 6x Forged Pistons (set of 6)
• 6x Wrist Pins
• 6x Ring Sets (CPT-3328PVD)
• Locks / Clips for each piston pin
• Spec Sheet / Installation Guide

Product Description

The CP Pistons SC7705-6 set is a high-performance forged piston & ring package engineered specifically for BMW's B48 2.0L inline-4 and B58 3.0L inline-6 turbo engines, and their Toyota GR Supra counterparts. Built with precision and durability in mind, this set maintains the factory standard bore and stroke while elevating component strength to reliably handle elevated boost, performance cam profiles, or motorsport usage.

With an 11.0:1 compression ratio, the SC7705-6 pistons are crafted for maximum thermal and mechanical endurance. The included ring set (CPT-3328PVD), wrist pins, locks, and the spec guide ensure you have a complete package ready for installation. Ideal for enthusiasts seeking to build a robust high-output platform while retaining factory dimensions for compatibility.

Fitment is confirmed through 2025 for BMW B48 & B58 turbocharged engines and Toyota Supra (A90/A91). 2025 model compatibility remains affirmed unless otherwise noted. Verify block & head configuration before fitting, especially under heavily modified or stroked applications.