B58 Gen2 Turbo Kit by DOC Race

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2020–2024 BMW M340i / M240i B58 Gen 2 Top Mount Turbo Kit

Upgrade your B58 Gen 2-powered M340i or M240i with this top-mount turbo kit, designed for high-horsepower builds and maximum efficiency. Now available in two different runner sizes to match your performance goals:

• 1.25" Schedule 40 Runners – Industry standard, proven to support over 1200 HP, featuring a high-flow investment cast collector for optimal performance.
• 1.5" Schedule 40 Runners – Larger diameter for reduced exhaust backpressure, maximizing power without increasing turbo lag.

Key Features

• Premium tubular stainless manifold (1.90” OD runners)
• PTE turbo compatibility only (designed for precise fitment—other turbos will not fit)
• Dual Turbosmart 45mm wastegates for optimal boost control
• 3.5” stainless downpipe for improved exhaust flow
• High-quality stainless steel components, including oil and coolant lines, charge piping, and v-band clamps
• Polished exhaust components (ceramic coating available as an option)
• Heat shield and wastegate dump tubes included

Note: This kit is designed exclusively for PTE turbos. Adapting it for other turbos may result in poor fitment and performance issues.

Kit Includes: 

• PTE Turbo if selected 
• Turbosmart 45mm wastegates (2)
• Tubular stainless manifold (1.90” OD runners)
• 3.5” stainless downpipe
• Wastegate dump tubes (2)
• Charge pipe from turbo to TB (2)
• Silicone couplers and clamps
• Stainless oil drain line kit
• Stainless oil feed line kit
• Stainless coolant bypass line kit
• T4 gasket
• Turbo studs and nuts
• Exhaust v-band clamp
• 4” turbo screen
• Heat shield
• 1/4” nylon tubing and fittings (wastegate routing)
• Valve cover vent filter 
• 3/4” boost caps (2)

BMW B58 Gen 2 G-Chassis Applications:

2 Series

2022-2024     G42     M240i RWD
2022-2024     G42     M240i xDrive

3 Series

2020-2024     G20     M340i RWD
2020-2024     G20     M340i xDrive