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Supertech BMW B58 82.5mm Bore 36cc 11:1 CR Pistons - Set of 6 (Excl Rings)
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Supertech BMW B58 82.5mm Bore 36cc 11:1 CR Pistons - Set of 6 (Excl Rings)

Supertech
SPTP4-MINB48-82.5-CR11-6
Piston Sets - Forged - 6cyl
2 Units In Stock - Ships Next Business Day
$ 1,257.30 $ 1,006.08
$ 1,006.08

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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