R2P Heat-Shielded Downpipe for BMW B58 (High Flow) – Performance and Protection for M140i, M340i, 440i and Supra

The R2P Downpipe with thermal insulation is a high-performance part designed for BMW B58 engines. Its purpose is to optimize heat management and improve exhaust gas flow, allowing the turbocharger to work more efficiently. It improves power and torque by reducing back pressure, while its integrated heat shield protects the engine bay from extreme temperatures. Ideal for Stage 2 builds and track use.

Key features

• Full thermal insulation: Drastically reduces the temperature in the engine bay, protecting sensors, hoses and plastic components from radiant heat.
• High-flow design: Minimizes exhaust restrictions, improving throttle response and providing a notable power gain.
• High-grade stainless steel construction: Resistant to corrosion and the most demanding sporty driving conditions.
• Optimized sound: Provides a deeper, more aggressive tone without compromising the elegance of the B58 engine.
• Direct installation (Plug & Play): Direct replacement with no permanent structural modifications.

Technical specifications

• Brand: R2P
• Material: High-grade stainless steel with insulating coating
• Compatible engine: BMW B58 (3.0L Inline-6 Turbo, B58B30)
• Installation type: Direct replacement (Plug & Play)
• Finish: Aerospace-grade thermal insulation

Compatibility

Compatible models:

• BMW 1 Series (M140i F20/F21)
• BMW 2 Series (M240i F22/F23)
• BMW 3 Series (340i F30/F31/F34 and M340i G20)
• BMW 4 Series (440i F32/F33/F36)
• BMW 5 Series (540i G30/G31)
• BMW Z4 (G29 M40i)
• Toyota GR Supra (A90/A91 with B58 engine)

Years: 2015 onwards

Advantages over other options

The OEM downpipe includes restrictive catalytic converters and lacks efficient thermal insulation. The R2P version allows much faster gas evacuation. Unlike budget alternatives without insulation, the R2P prevents residual heat from degrading surrounding components, keeping the intake air density lower and more stable.

Frequently asked questions

• Is it necessary to remap the ECU? Yes, to avoid the check engine light (CEL) and maximize power gains, a Stage 2 remap is recommended.
• How does the thermal insulation help? It keeps heat inside the exhaust, which increases gas speed and protects sensitive engine parts against overheating.
• Is it compatible with the stock exhaust? Yes, it is designed to fit perfectly with the original exhaust system or compatible aftermarket systems.

Shipping and warranty

• In stock: Immediate shipping available.
• Fast shipping: Secure delivery with tracking.
• Compatibility guarantee: Verified for B58 engines.