4.5" B58 Downpipe For Supra 3.0T & BMW M340i, M440i, M240i, 340i, 440i, 540i, 640i, 740i, X3, X4, X5

Unleash Aggressive Sound & Performance with Our 4.5" B58 Downpipe

Unlock the full potential of your BMW or Toyota Supra with the Palenon Performance Version II 4.5" Downpipe—engineered specifically for Gen 1 & Gen 2 B58 engines. Compatible with 2016–present BMW models—including the 340i, 440i, M340i, M440i, M240i, X5 40i, Z4, 540i, 640i, 740i—and the 2020+ Toyota Supra 3.0T, this high-flow downpipe is designed to replace the restrictive OEM catalytic converter and dramatically enhance turbocharger efficiency.

Constructed from robust 304-grade stainless steel and featuring precision-formed 4.5” smooth radius bends, it delivers quicker turbo spool, increased horsepower, and a deeper, more aggressive exhaust tone. Its direct-fit design ensures easy installation and seamless compatibility with both OEM and aftermarket exhaust systems—making it the perfect upgrade for performance enthusiasts seeking maximum power and sound.

Check Here If you have Gen3 Models

Features

• Faster Spool: Achieve quicker turbo response with reduced exhaust backpressure.
• Reduced Restriction: Enhanced flow for improved power gains.
• Increased Power: Gain noticeable horsepower and torque increases.
• Aggressive Exhaust Note: Enjoy a more dynamic and thrilling exhaust sound.
• Easy Installation: Fits both right and left-hand drive models with no modifications needed.
• Versatile Fitment: Compatible with factory and aftermarket exhaust systems.

Our racing-grade downpipes are expertly crafted from premium stainless steel, using precise and standardized bending techniques to ensure optimal performance and thrilling exhaust note. Our downpipe pricing is U.S. market guaranteed. With an unwavering commitment to both price and quality, we adhere to a "customer-first" standard, ensuring that our products exceed expectations without compromise.

Installation Profile:

Installing this b58 catless downpipe will trigger a check engine light (CEL) due to the absence of the OEM catalyst. To address this, we offer a CEL Delete Kit with O2 sensor spacers, calibrated to meet BMW’s parameters and remove the CEL without requiring a tune.

Why Choose Palenon Performance?

At Palenon Performance, we are dedicated to excellence in our exhaust products. Our Version II B58 Downpipe is crafted with top-grade stainless steel and advanced manufacturing techniques for unmatched strength and performance. Our skilled engineers and designers push the boundaries of innovation to deliver high-quality, high-performance parts. With rigorous testing and a commitment to customer satisfaction, Palenon Performance stands as the trusted choice for superior exhaust solutions.

Transform your BMW’s performance with Palenon Performance’s Version II B58 Downpipe. Order now and feel the difference!

Fitment

• 2019-2024 G20, G22 & G26 BMW M340i & M440i & xDrive
• 2019-2024 F22 BMW M240i & xDrive
• 2021-2024 G42 BMW M240i & xDrive
• 2019-2024 G14/G15/G16 840i & xDrive
• 2016-2024 F22/F23 BMW M240i & M240i xDrive
• 2016-2019 F30/F31 BMW 340i & 340i xDrive
• 2016-2019 F32/F33/F36 BMW 440i & 440i xDrive
• 2016-2024 G30 BMW 540i & 540i xDrive
• 2016-2023 G32 GT BMW 640i & 640i xDrive
• 2016-2022 G11/G12 BMW 740i & 740i xDrive
• 2017 – 2022 G01 BMW X3 M40iX xDrive
• 2017 – 2020 G02 BMW X4 M40iX xDrive
• 2019-2024 G05 BMW X5 40i & xDrive
• 2019-2024 G29 BMW Z4 M40i
• 2020+ Supra A90/A91 3.0T