BMW 1-Series Downpipes – Catted & Decat Performance Exhaust Upgrades

BMW 1-Series Downpipes – Unlock the Full Performance Potential

The BMW 1-Series combines dynamic handling, sharp design, and strong engine options, making it one of the most exciting compact cars in BMW’s lineup. Whether you own a BMW 116i, 118d, 120i, or the high-performance M135i or M140i, upgrading to a performance BMW 1-Series downpipe is one of the most effective ways to improve power, reduce turbo lag, and enhance your driving experience.

Why Upgrade to a Performance BMW 1-Series Downpipe?

The OEM downpipe prioritizes emissions compliance and sound restrictions but significantly limits exhaust flow. Replacing it with a high-flow performance downpipe provides multiple benefits:

• Increased horsepower and torque – optimized exhaust flow lets your engine breathe freely, boosting performance.
• Faster turbo spool – reduces turbo lag for sharper throttle response and stronger acceleration.
• Enhanced exhaust tone – catted downpipes produce a refined, sporty sound, while decat downpipes unleash an aggressive motorsport roar.
• Lower exhaust gas temperatures – better thermal efficiency protects key components during spirited driving.
• Perfect for ECU tuning – essential for Stage 1, Stage 2, and hybrid turbo setups.

Types of BMW 1-Series Downpipes

Our range of BMW 1-Series downpipes caters to different performance goals and driving needs:

Catted BMW 1-Series Downpipes

Catted downpipes feature a high-flow sports catalytic converter, combining emissions compliance with improved performance. Ideal for daily-driven builds in areas requiring emissions testing.

Decat BMW 1-Series Downpipes

Decat downpipes remove the catalytic converter entirely, maximizing exhaust flow and unlocking peak performance. Perfect for track builds or regions without emissions restrictions.

Material Options: Stainless Steel & Titanium

Our BMW 1-Series downpipes are crafted using premium materials for optimal durability and performance:

• Stainless steel downpipes – durable, corrosion-resistant, and cost-effective.
• Titanium downpipes – ultra-lightweight, superior heat resistance, and a premium motorsport finish.

Engine Compatibility

We offer BMW 1-Series downpipes compatible with multiple petrol and diesel variants:

• BMW 1-Series 114i / 116i / 118i / 120i Downpipes – optimized for smaller turbocharged petrol engines.
• BMW 1-Series 125i / 130i Downpipes – performance solutions for larger six-cylinder petrol engines.
• BMW 1-Series M135i Downpipes – designed for the 3.0L N55 and B58 turbocharged engines.
• BMW 1-Series M140i Downpipes – high-flow options for the flagship 1-Series performance model.
• BMW 1-Series 116d / 118d / 120d Downpipes – optimized for diesel torque and efficiency gains.
• BMW 1-Series M140d Downpipes – engineered for high-output diesel builds.

Performance Gains with BMW 1-Series Downpipes

Installing a performance BMW 1-Series downpipe offers noticeable improvements in power and drivability:

• +15–40 HP from a downpipe upgrade alone.
• +45–80 HP when paired with Stage 2 ECU remapping.
• Substantial torque gains for stronger mid-range performance.
• Sharper throttle response and reduced turbo lag.

Choosing the Right Diameter

The right pipe diameter ensures optimal performance based on your build:

• 2.5-inch downpipes – perfect for lightly tuned or Stage 1 builds.
• 3-inch downpipes – recommended for Stage 2 setups, hybrid turbo conversions, and high-boost applications.

All our BMW 1-Series downpipes are designed for direct bolt-on installation, ensuring perfect fitment without cutting or welding.

Build Quality & Engineering

Our performance downpipes are built using advanced engineering techniques to guarantee top performance and durability:

• Mandrel-bent tubing for smooth, unrestricted exhaust flow.
• High-grade stainless steel or lightweight titanium construction.
• Precision TIG welding ensures maximum strength and leak-free operation.
• OEM-style flanges and fittings for seamless integration.

Tuning Potential

Pairing a BMW 1-Series downpipe with ECU remapping unlocks the car’s full performance potential:

• Significant horsepower and torque gains.
• Optimized turbo boost and fuel delivery strategies.
• Custom exhaust note tailored to your setup.
• Smoother throttle response and enhanced drivability.

Daily Driving vs Track Builds

For everyday street-driven builds, catted downpipes provide the ideal balance between performance and emissions compliance. For track-focused setups, decat downpipes deliver maximum exhaust flow, top-end power, and a raw motorsport tone.

Conclusion

Upgrading your BMW 1-Series with a performance downpipe is one of the most effective modifications for increasing horsepower, reducing turbo lag, and achieving a sportier exhaust note. Whether you choose a catted or decat option, our range of BMW 1-Series downpipes guarantees precision fitment, premium materials, and proven performance gains. Take your 1-Series to the next level today.