Whether you're chasing 600 horsepower or building a four-digit race engine, your rotating assembly needs to be engineered for the demands of high boost and high RPM. Supertech Forged Pistons and Connecting Rods provide the strength, precision, and reliability trusted by professional engine builders around the world.
Manufactured from premium forged materials and precision CNC machined, Supertech B58 components are designed to withstand the extreme cylinder pressures generated by today's turbocharged BMW and Toyota B58 engines.
Whether you're upgrading a street car, drag car, drift build, or dedicated road race machine, Supertech delivers the confidence needed to push your engine further.
Supertech Forged Pistons
Every Supertech piston is engineered for maximum durability while reducing friction and maintaining excellent ring seal under extreme combustion pressures.
Features include:
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Premium forged 4032 or optional 2618 aluminum construction
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Lightweight slipper skirt design
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Chrome-moly wrist pins included
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Japanese-manufactured piston rings
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Computer-designed skirt profiles for excellent stability
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Compatible with Supertech or OEM connecting rods
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Designed specifically for turbocharged and nitrous applications
Ideal for:
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High Boost
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E85
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Methanol
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Road Racing
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Drag Racing
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Drift
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Time Attack
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Street Performance
Available Piston Configurations
Standard Bore
| Bore | Compression Ratio | Material |
| 82.0mm |
10.2:1 |
4032 |
| 82.0mm |
11.0:1 |
4032 |
Oversize
| Bore | Compression Ratio | Material |
| 82.5mm (+0.50mm) |
11.0:1 |
4032 |
Piston Specifications
| Specification | Value |
| Engine |
BMW / Toyota B58B30 |
| Bore |
82.0mm STD / 82.5mm Oversize |
| Material |
4032 Forged Aluminum (2618 available) |
| Compression Ratio |
10.2:1 or 11.0:1 |
| Stroke |
94.60mm |
| Rod Length |
148.30mm |
| Pin Diameter |
22mm |
| Compression Height |
33.20mm |
| Weight |
298-308g |
| Head Volume |
36cc |
| Skirt Design |
Slipper |
| Application |
Turbo / Nitrous |
Supertech Forged Connecting Rods
When factory rods become the limiting factor, Supertech Forged Connecting Rods provide the strength needed for high boost and sustained high-RPM operation.
Each connecting rod is forged from premium alloy steel, CNC machined, precision balanced, and supplied with genuine ARP fasteners.
Available in both H-Beam and I-Beam configurations to suit your engine build.
H-Beam Connecting Rods
Excellent for:
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High-horsepower street cars
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Road racing
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Time attack
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Drift
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Heavy boost applications
Specifications
| Specification | Value |
| Design |
H-Beam |
| Center-to-Center |
148.3mm |
| Big End Bore |
53.66mm |
| Pin Bore |
22mm |
| Big End Width |
23.90mm |
| Weight |
471g |
Part Number:
CR-BMB58-H148.3-6
I-Beam Connecting Rods
Designed for the most demanding racing applications where maximum rigidity is required.
Perfect for:
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Drag Racing
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Standing Mile
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Competition Builds
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Extreme Horsepower
Specifications
| Specification | Value |
| Design |
I-Beam |
| Center-to-Center |
148.3mm |
| Big End Bore |
53.66mm |
| Pin Bore |
22mm |
| Big End Width |
23.90mm |
| Weight |
674g |
Part Number:
CR-BMB58-I148.3-6
Why Choose Supertech?
For more than two decades, Supertech has earned the trust of professional engine builders by producing precision-engineered valvetrain and rotating assembly components capable of surviving the harshest racing environments.
Every piston and connecting rod is manufactured to exacting tolerances, weight matched, and designed to deliver long-term reliability in today's high-output turbocharged engines.
Whether you're assembling a weekend street car or a dedicated race engine, Supertech provides the strength and consistency serious builders demand.
Vehicle Fitment
BMW
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G20 M340i
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G21 M340i Touring
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G22 M440i
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G23 M440i Convertible
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G29 Z4 M40i
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G30 540i
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G32 640i Gran Turismo
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G42 M240i
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G01 X3 M40i
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G02 X4 M40i
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G05 X5 xDrive40i
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G06 X6 xDrive40i
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G07 X7 xDrive40i
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F90 M5 (B58 not applicable--omit)
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F97/F98 variants where equipped with the B58
Toyota
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GR Supra (A90)
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GR Supra (A91)