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SKU: P4-MINB48-82.5-CR11-6
Supertech BMW B58 82.5mm Bore 36cc 11:1 Compression Ratio Forged Pistons - Set of 6 (Excludes Rings)
BMW B58 engine build with Supertech's 82.5mm bore forged pistons, crafted to handle aggressive turbo setups and deliver consistent power under high-revving demands. These 11:1 compression ratio pistons provide the durability needed for track days or daily driven performance, allowing your inline-6 to push beyond stock limits while resisting detonation and wear in boosted applications.
Key Specifications
- Bore Size: 82.5mm (0.5mm oversize for increased displacement)
- Compression Ratio: 11:1
- Dome Volume: 36cc (standard dish design for balanced airflow)
- Compression Height: 33.2mm
- Stroke Compatibility: 94.6mm
- Rod Length: 148.3mm
- Wrist Pin Diameter: 22mm
- Skirt Style: Slipper design for reduced friction and weight
- Material: Forged from enhanced 4032 aluminum alloy with high silicon content, plus added copper, nickel, and magnesium for low thermal expansion, superior wear resistance, and improved heat dissipation gumotorsport.com +1
- Piston Weight: 305 grams each (total set weight approximately 1.83 kg / 4.03 lbs)
- Heat Treatment: Multi-stage process for even hardness distribution and high tensile strength, proven to endure up to 42 psi of turbo boost on alcohol fuels without failure
Supertech leverages over 40 years of racing expertise, using advanced CAD software and finite element analysis to engineer these pistons for maximum strength-to-weight efficiency. The result is a component that supports reliable operation in high-stress environments, making it the go-to option for tuners aiming to extract every horsepower from the B58 platform.
What's Included in Your Purchase
This complete set delivers everything essential for a precision piston swap:
- 6 x Forged pistons (pre-machined ring grooves for exact fit)
- 6 x Chrome-moly wrist pins
- 12 x Circlips (spiro locks for secure pin retention)
Note: Piston rings are excluded order separately based on your ring gap specs (recommended Supertech R82.5-GNH8250 for this bore).
All components arrive ready for assembly, with tolerances held to racing standards for seamless integration into your B58 block.
Vehicle Fitment
Engineered specifically for the BMW B58 3.0L inline-6 turbocharged engine, these pistons fit a wide range of performance-oriented BMW models and one Toyota application. Confirm compatibility with your exact chassis and year for optimal results:
|
Year Range |
Make & Model |
Chassis Code |
Engine Notes |
|
2016-2019 |
BMW 340i |
F30 |
Sedan |
|
2017-2020 |
BMW M240i |
F22/F23 |
Coupe/Convertible |
|
2016-2020 |
BMW 440i |
F32/F33/F36 |
Coupe/Convertible/Gran Coupe |
|
2017-2023 |
BMW 540i |
G30 |
Sedan |
|
2018-2023 |
BMW X3 M40i |
G01 |
SUV |
|
2019-2023 |
BMW X4 M40i |
G02 |
SUV Coupe |
|
2020-2023 |
BMW Z4 M40i |
G29 |
Roadster |
|
2017-2023 |
BMW 740i |
G11/G12 |
Sedan/Coupe |
|
2019-2023 |
BMW 840i |
G14/G15/G16 |
Coupe/Convertible/Gran Coupe |
|
2019+ |
Toyota GR Supra |
A90 |
Coupe (uses BMW B58) |
Important: These pistons require professional installation, including block boring/honing to 82.5mm and proper ring gapping. Not CARB-legal for emissions-restricted areas.
Packaging and Shipping Details
- Part Weight: 6.4 lbs (shipping weight for the full set)
- Box Dimensions: 9 inches wide x 4 inches high x 14.9 inches deep Securely packaged to prevent damage during transit, with protective sleeves on each piston.
Invest in Supertech BMW B58 82.5mm pistons to transform your ride into a dominant force on the road or strip pair them with upgraded rods and tuning for outputs well over 500 hp.
Order your P4-MINB48-82.5-CR11-6 set today and experience the difference in every shift.
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