BMW B58 Forged Internals — Rods & Pistons Kit
The BMW B58 3.0L inline-6 is BMW's most advanced turbocharged six-cylinder — powering everything from the Toyota GR Supra to the BMW M340i, X3 M40i, and 7 Series 740i. The stock cast internals handle 500–600whp reliably, but beyond that the rods and pistons become the limiting factor. Our B58 forged internals kit replaces the stock components with race-grade forged units capable of handling serious power builds on pump fuel, E30, or full E85.
What's Included
- 6x Forged Connecting Rods — 4340 aircraft-grade steel, I-beam design
- 6x Forged Pistons — CP or equivalent specification, 82.00mm bore, 10.2:1 compression ratio, 33.20mm compression height
- ARP Rod Bolts — 220,000 PSI rated
- Piston Rings — Low-tension performance ring pack
- Wrist Pins & Clips — High-strength tool steel (HD wrist pins available for 850HP+ builds)
- Balanced and Matched Set — within ±1.5g
Key Features
- Ceramic-Coated Piston Tops — Thermal barrier coating reduces heat transfer to the piston crown, protecting against detonation under high-boost operation on B58 platforms
- Teflon-Coated Skirts — Anti-friction coating reduces piston-to-wall contact friction, improving reliability and reducing wear under sustained high-RPM operation
- Factory Compression Ratio (10.2:1) — Maintains stock compression geometry for seamless integration with OEM or aftermarket B58 ECU calibrations (bootmod3, MHD, xHP, etc.)
- 1,000HP Rated Standard — Handles four-figure builds on pump fuel, E30, or E85
- 1,500HP with HD Wrist Pins — Big single turbo, methanol, and race-fuel builds
- Drop-In Fitment — Direct replacement for factory B58 rods and pistons, no block modifications required at standard bore
Complete Kit — Not a Configurator
Most premium B58 internals sell as separate pistons, separate rods, separate ARP bolts, separate rings — three vendors, three shipments, three-way accountability. Sourcing a CP-Carrillo B58 piston set from Miami Engines ($1,349) plus PRO-H rods (~$2,000+) plus ARP bolts, rings, and balancing service lands at ~$3,700+ before you've assembled anything, and you're paying US-only domestic shipping on each order.
The YPG B58 kit is one order, one price, thermal-coated pistons included, ARP hardware included, balanced set, FedEx International Priority to anywhere in the world. Every part matched and shipped together. $4,999 flat.
Compatible Vehicles
- Toyota GR Supra — A90 (2019–present)
- BMW Z4 M40i — G29 (2018–present)
- BMW 340i — F30/F31/F34 (2015–2019)
- BMW M340i — G20/G21 (2019–present)
- BMW 440i — F32/F33/F36 (2016–2019)
- BMW M440i — G22 (2020–present)
- BMW M140i — F20/F21 (2016–2019)
- BMW M240i — F22/F23 (2016–2021) · G42 (2021–present)
- BMW 540i — G30/G31 (2017–present)
- BMW 640i — G32 (2017–present)
- BMW 740i/Li — G11/G12 (2016–present)
- BMW 840i — G14/G15/G16 (2019–present)
- BMW X3 M40i — G01 (2017–present)
- BMW X4 M40i — G02 (2018–present)
- BMW X5 xDrive40i — G05 (2018–present)
- BMW X6 xDrive40i — G06 (2020–present)
- BMW X7 xDrive40i — G07 (2018–present)
- All B58 variants — B58B30M0, B58B30M1, B58B30O1
Why Upgrade the B58 Internals?
The stock B58 uses cast connecting rods and pistons. While durable at moderate power levels, cast components crack under sustained high-boost operation. At 600–700whp+ the rods are the first failure point — typically bending or snapping under high-RPM boost spikes. Forged internals eliminate this risk entirely, giving you a foundation that can handle whatever turbo and fuelling combination you choose to run.
Why YPG Motorsport?
YPG Motorsport holds the world record for the first sub-10-second Mercedes-AMG C63 W205 quarter mile (9.97s at 828 WHP). The same forging sources and QC standards used to build our record-setting AMG bottom ends are applied to every B58 kit. Sourced from CP-Carrillo or equivalent tier-1 forging houses, thermal-coated, balanced and matched before shipping.
Ships worldwide via FedEx International Priority from Kuwait.
Related Products
- BMW N55 Forged Internals — 1,000HP+ Rated | Pistons, Rods, Rings — $4,999
- BMW S65 Forged Internals — 1,000HP+ Rated | I-Beam Rods, Pistons, Rings — $5,999
Frequently Asked Questions
How much does the BMW B58 Forged Internals kit cost?
The BMW B58 Forged Internals kit is $4,999 through YPG Motorsport with free worldwide shipping. Complete kit — pistons, rods, ARP bolts, rings, wrist pins, balanced set — one order.
How much HP can the B58 handle with these internals?
The kit is rated to 1,000HP in standard configuration and up to 1,500HP with HD wrist pins. Suitable for pump fuel, E30, E85, and methanol builds.
Are the pistons thermal-coated?
Yes. All YPG B58 forged pistons ship with ceramic thermal barrier coating on the crowns and Teflon anti-friction coating on the skirts — included at no extra cost. Standalone thermal coating services (Swain Tech, Calico) typically run $200–400 per set.
Are these drop-in replacements for the B58?
Yes. Direct drop-in replacement for factory B58 connecting rods and pistons. 82.00mm bore with 10.2:1 compression ratio, designed for builds that exceed factory power levels.
Will these fit the Toyota GR Supra?
Yes. The A90 GR Supra uses the same BMW B58 engine. These forged internals are a direct fit for all B58-powered vehicles including the Supra.
Do you ship forged internals worldwide?
Yes. Free worldwide shipping on all YPG Motorsport forged internals.