RPM Forged High-Boost H-Beam Rods & Pistons Kit (BMW B48)

Forged H-Beam Connecting Rods + 4032 Pistons Kit (B48 Engine)

Upgrade your BMW B48 engine with confidence using RPM Tuning’s Forged Rods and Pistons Kit - engineered for high horsepower, high boost, and relentless durability. Whether you’re building a track machine or a daily-driven sleeper, this kit delivers race-proven strength for serious performance.

✅ Why Choose RPM Tuning Forged Internals for Your B48?

Our forged rods are crafted from 4340 aircraft-grade chrome moly steel, known for its exceptional tensile strength and resistance to fatigue under extreme conditions. Paired with 4032 forged aluminum alloy pistons, this kit is designed to endure the harshest operating environments - from high-revving track days to aggressive street pulls.

Both components are forged, precision CNC-machined, and shot-peened for stress relief. Each rod and piston is weight-balanced to a tight tolerance, ensuring smooth, high-RPM operation and engine longevity.

⚙️ Product Features

🔩 Professional H-Beam Rod Design

• Robust H-beam profile optimized for resisting bending under high cylinder pressures

• Lighter than I-beams without sacrificing durability

• Ideal for turbocharged, high-boost, and motorsport applications

🧊 Forged 4340 Chrome Moly Steel Rods

• Aerospace-grade forging for maximum density

• Heat-treated and shot-peened for long-term fatigue resistance

• Bronze alloy small-end bushings for smooth wrist pin travel

🛠️ Forged 4032 Aluminum Alloy Pistons

• Excellent strength-to-weight ratio with reduced thermal expansion

• Balanced for consistent combustion chamber pressure and reduced piston slap

• Designed to withstand high cylinder pressures and knock scenarios

🔧 ARP 2000 Rod Bolt Compatibility (Rated for 800–1000+ HP)

• Engineered to seat genuine ARP bolts with maximum clamping force

• Bolt tunnels and caps precision-machined with deep locking grooves

🎯 Precision CNC Machined

• Exact tolerances ensure tight clearances, true round bores, and optimal ring sealing

• Pistons and rods balanced to within +/-1.5g per set for perfect rotational equilibrium

💡 Shot-Peened Finish

• Internal stress-relief treatment to prevent micro-cracks under extreme load

• Extends fatigue life in high-stress applications

📊 Technical Specs Summary:

🧩 Compatible With BMW B48 Engines in:

1' F21 LCI   (10/2015 — 06/2019)
1' F52 Sedan   (11/2015 — 08/2019)
2' F22   (09/2015 — 06/2017)
2' F22 LCI   (09/2016 — 06/2021)
2' F23   (09/2015 — 06/2017)
2' F23 LCI   (10/2016 — 07/2021)
2' F45 Active Tourer   (03/2014 — 03/2018)
2' F45 Active Tourer LCI   (06/2017 — 12/2018)
2' F46 Gran Tourer   (07/2014 — 03/2018)
3' F30 LCI   (09/2014 — 03/2019)
3' G20 Sedan   (01/2018 — 06/2022)
3' G20 Sedan LCI   (09/2021 — 03/2025)
3' F35 LCI   (07/2015 — 03/2019)
3' F31 LCI   (09/2014 — 06/2019)
3' F34 GT LCI   (09/2015 — 05/2021)
4' F32   (05/2015 — 02/2017)
4' F32 LCI   (05/2016 — 06/2020)
4' G22 Coupé   (11/2019 — 01/2024)
4' G22 Coupé LCI   (03/2023 — 03/2025)
4' F33   (03/2015 — 02/2017)
4' F33 LCI   (05/2016 — 07/2020)
4' F36 Gran Coupé   (03/2015 — 03/2017)
4' F36 Gran Coupé LCI   (06/2016 — 05/2021)
4' G26 Gran Coupé   (12/2020 — 04/2024)
4' G26 Gran Coupé LCI   (06/2024 — 03/2025)
5' G30   (09/2016 — 06/2020)
5' G30 LCI   (07/2019 — 06/2023)
5' G38   (10/2016 — 08/2020)
5' G31 Touring   (09/2016 — 06/2019)
X1 F48   (11/2014 — 03/2018)
X1L F49   (12/2014 — 08/2019)
X3 G01   (12/2016 — 08/2021)
X3 G01 LCI   (09/2020 — 06/2024)
X3 G08   (01/2017 — 12/2020)
X4 G02   (04/2017 — 07/2019)
MINI F56   (04/2013 — 07/2019)
MINI F55   (09/2013 — 06/2019)
MINI Clubman F54   (11/2014 — 07/2019)
MINI Cabrio F57   (11/2014 — 06/2019)
MINI Countryman F60   (11/2015 — 06/2019)

💡 Please confirm piston compression height and piston crown clearance for 20i & 30i, and also inquire to confirm Gen 1 vs Gen 2 B48 variants prior to assembly.

🔥 Built for Boost. Forged for Battle.
The RPM Tuning Forged Rods + Pistons Kit for the B48 is the ultimate choice for serious enthusiasts chasing high boost, bulletproof reliability, and high-revving performance. Pair with upgraded bearings, head studs, and cooling for the complete forged bottom end.