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For BMW M340i 3.0T GFC Decat Downpipe (Straight-Through Front Pipe)

Original price was: $492.00.Current price is: $418.00.

Discount valid for 24 hours

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SKU: BMW M340i 3.0T-4 Categories: , ,

Warranty service:3 years

Production cycle:10-15DAYS

Overview

GFC Decat Downpipe (Straight-Through Front Pipe)

For BMW M340i 3.0T B58 (2020–2026)

Performance Downpipe | Unrestricted Turbo Spool & Flow | Deep Inline-6 Exhaust Note | Premium 304 Stainless Steel Construction

Unlock Maximum B58 Turbo Response, Aggressive Exhaust Notes & Peak Flow for Your BMW M340i.

Engineered specifically for the BMW M340i (covering model years 2020–2026 under the G20/G21 platform) powered by the renowned 3.0L turbocharged B58 inline-6 engine, this performance decat downpipe eliminates the most restrictive bottleneck in your factory exhaust system. Designed with an uncompromised straight-through architecture, it drastically reduces backpressure to speed up turbo spool-up, boost horsepower, and unleash an aggressive, throatier exhaust tone.

Crafted for Maximum Thermal Endurance and Precision Fitment Built from premium 304 stainless steel, this downpipe is engineered to withstand the intense exhaust temperatures generated by high-boost turbocharging. Its smooth, mandrel-bent piping optimizes gas velocity straight out of the turbocharger, ensuring exceptional structural durability and a direct, factory-matching bolt-on fit.

DETAIL

🔥 Key Feature

Unrestricted Decat Straight-Through Flow Replaces the restrictive factory catalytic converter with an open, free-flowing design to eliminate backpressure, significantly improving turbo responsiveness and top-end power.

Quicker Turbo Spool & Increased HP Reduces turbo lag by allowing exhaust gases to exit the turbine housing with minimal resistance, yielding gains in horsepower and torque across the rev range.

Aggressive B58 Acoustic Enhancement Amplifies the signature deep inline-6 tone of the B58 engine, bringing out crisper burbles, pops, and a much more assertive exhaust presence under acceleration.

Premium 304 Stainless Steel Construction Constructed entirely from high-grade stainless steel to provide superior resistance to high thermal stress, cracking, and harsh under-hood conditions.

Precision TIG-Welded Finish Expertly hand-welded using TIG techniques to guarantee smooth internal transitions, prevent exhaust leaks, and ensure long-term structural reliability.

Direct Bolt-On Factory Fitment Engineered to match factory turbo V-band flanges and hanger locations precisely for a straightforward, seamless installation process.

spec
Fitment: BMW M340i / Sedan & Touring (G20/G21)
Engine:3.0L Turbocharged Inline-6 (B58 / B58B30)
System Type:Downpipe / Front Pipe (Decat / Straight-Through)
Warranty:3 Years
Welding:Precision TIG Welded
Material:304 Stainless Steel
Installation:Direct Bolt-On
COMPANY VIDEO

We are a 15-year-old factory specializing in manufacturing high-quality automobile exhaust systems and accessories. Our product range includes exhaust manifolds, downpipes, cat-back exhausts, mufflers, electronic valves, exhaust tips, and other auto parts.

Why Choose Our Exhaust Systems?

☆ Perfect Fit: Manufactured according to the original car’s mounting holes, ensuring 100% installation compatibility.
☆ Experience & Expertise: With over 13 years in exhaust production and sales, we have molds for the most popular models, widely praised by our customers.
☆ Advanced Mufflers: Our factory-developed mufflers provide a silencing effect close to the original exhaust, delivering a comfortable driving experience.
☆ Electronic Valve Control: Equipped with our latest electronically controlled valves, allowing you to adjust the exhaust sound freely.
☆ Reliable Production & Delivery: Independently produced in our factory, with 100% order fulfillment and guaranteed delivery times.
☆ Customized Services: We offer tailored exhaust solutions for various car models according to your needs.

Our Expertise

For 15 years, we have specialized in manufacturing, producing, and selling automobile exhaust systems, with thousands of original exhaust models in our database. Our coverage includes brands such as:

Porsche | BMW | Mercedes-Benz | Audi | McLaren | Ferrari | Mitsubishi | Lamborghini | Bentley | Subaru | Aston Martin | Toyota | Volkswagen | Cadillac | Camaro | Dodge | Jaguar | Nissan | Alfa Romeo | Maserati

If you have a specific model and custom requirements, click here to inquire and contact us. We will provide professional solutions tailored to your vehicle.

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faq

  • What vehicles is this catback exhaust system compatible with?

    This catback exhaust system is specifically designed for BMW M340i (G20 chassis, 2019+) and BMW M440i (G22 chassis, 2021+) models equipped with the 3.0T B58 engine. It is not compatible with non-M340i/M440i 3 Series (G20) or 4 Series (G22) variants, or models with different engine configurations.

  • What does “catback” mean, and how is it different from other exhaust systems?

    This catback exhaust system is specifically designed for BMW M340i (G20 chassis, 2019+) and BMW M440i (G22 chassis, 2021+) models equipped with the 3.0T B58 engine. It is not compatible with non-M340i/M440i 3 Series (G20) or 4 Series (G22) variants, or models with different engine configurations.

  • What performance benefits will I gain from installing this catback exhaust?

    This catback exhaust system is specifically designed for BMW M340i (G20 chassis, 2019+) and BMW M440i (G22 chassis, 2021+) models equipped with the 3.0T B58 engine. It is not compatible with non-M340i/M440i 3 Series (G20) or 4 Series (G22) variants, or models with different engine configurations.

  • Is this exhaust system street-legal? Does it comply with emissions laws?

    This catback exhaust system is specifically designed for BMW M340i (G20 chassis, 2019+) and BMW M440i (G22 chassis, 2021+) models equipped with the 3.0T B58 engine. It is not compatible with non-M340i/M440i 3 Series (G20) or 4 Series (G22) variants, or models with different engine configurations.

  • Can I install this exhaust myself, or do I need a professional?

    This catback exhaust system is specifically designed for BMW M340i (G20 chassis, 2019+) and BMW M440i (G22 chassis, 2021+) models equipped with the 3.0T B58 engine. It is not compatible with non-M340i/M440i 3 Series (G20) or 4 Series (G22) variants, or models with different engine configurations.

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