BMW 4-Series F32 Downpipes – Catted & Decat Performance Exhaust Upgrades

BMW 4-Series F32 Downpipes – Unlock the True Potential of Your Coupe

The BMW 4-Series F32, produced between 2013 and 2020, represents the two-door coupe variant of BMW’s beloved 3/4 Series platform. Built on BMW’s F3x architecture, the F32 blends sporty design with dynamic performance. However, the stock exhaust system, especially the restrictive OEM downpipes, limits your engine’s capabilities. Upgrading to performance BMW F32 downpipes is one of the most effective ways to increase power, reduce turbo lag, and achieve a deeper, more aggressive exhaust tone.

Why Upgrade to Performance BMW F32 Downpipes?

The factory downpipes are engineered for emissions and noise compliance, which restricts exhaust flow and limits turbo efficiency. Installing high-performance BMW 4-Series F32 downpipes offers several key advantages:

• Increased horsepower and torque – better exhaust flow reduces backpressure, unlocking hidden performance.
• Faster turbo spool – enjoy sharper throttle response and reduced turbo lag.
• Enhanced exhaust sound – catted downpipes deliver a sporty yet refined tone, while decat downpipes unleash a raw, motorsport-inspired roar.
• Lower exhaust gas temperatures – optimized flow improves cooling and reliability under heavy loads.
• Ideal for ECU tuning – essential for Stage 1, Stage 2, and hybrid turbo setups.

Types of BMW 4-Series F32 Downpipes

We offer a complete range of BMW F32 downpipes designed to suit different performance goals and driving styles:

Catted BMW F32 Downpipes

Catted downpipes feature a high-flow sports catalytic converter, providing performance gains while maintaining emissions compliance. Perfect for daily-driven vehicles in regions with strict emissions testing.

Decat BMW F32 Downpipes

Decat downpipes remove the catalytic converter entirely, allowing for maximum exhaust flow and peak performance. Ideal for track builds or areas without emissions restrictions.

Material Options: Stainless Steel & Titanium

The choice of material affects weight, durability, and heat resistance:

• Stainless steel downpipes – cost-effective, corrosion-resistant, and suitable for most setups.
• Titanium downpipes – ultra-lightweight, exceptional thermal properties, and premium motorsport aesthetics.

Engine Compatibility

Our BMW 4-Series F32 downpipes are designed for a variety of petrol and diesel engines:

• BMW 420i F32 Downpipes – optimized for the B48 2.0 turbo engine.
• BMW 428i F32 Downpipes – engineered for improved turbo response and mid-range torque.
• BMW 430i F32 Downpipes – designed to maximize flow for B48 engines.
• BMW 435i F32 Downpipes – built for the N55 six-cylinder turbo, ideal for Stage 2 setups.
• BMW 440i F32 Downpipes – optimized for the B58 six-cylinder powerhouse.
• BMW 420d & 430d F32 Downpipes – high-flow diesel options designed to improve torque and efficiency.
• BMW M4 F82 Downpipes – advanced solutions for S55 twin-turbo engines, perfect for high-boost builds.

Performance Gains with BMW F32 Downpipes

Installing performance BMW F32 downpipes results in significant improvements in power delivery and driving dynamics:

• +15–35 HP with the downpipe alone.
• +40–70 HP when paired with Stage 2 ECU remapping.
• Substantial torque gains for stronger mid-range pull.
• Sharper throttle response and reduced turbo lag.

Choosing the Right Diameter

Proper downpipe sizing is critical for maximizing performance:

• 2.5-inch downpipes – best for Stage 1 builds and lightly tuned setups.
• 3-inch downpipes – ideal for Stage 2 tuning, hybrid turbos, and high-boost applications.

All BMW F32 downpipes are designed for direct bolt-on installation, ensuring seamless fitment without cutting or welding.

Build Quality & Engineering

Each performance BMW 4-Series F32 downpipe is built using premium materials and cutting-edge manufacturing techniques:

• Mandrel-bent tubing for smooth, unrestricted exhaust flow.
• High-quality stainless steel or titanium construction.
• Precision TIG welding ensures durability and leak-free performance.
• OEM-style flanges and fittings for perfect integration.

Tuning Potential

Pairing your BMW F32 downpipes with ECU remapping unlocks their full potential:

• Maximizes horsepower and torque gains.
• Improves boost control and fueling strategies.
• Custom exhaust sound profiles based on catted or decat configurations.
• Compatible with Stage 1, Stage 2, and hybrid turbo builds.

Daily Driving vs Track Builds

For everyday street driving, catted downpipes provide a balanced upgrade with emissions compliance and performance improvements. For motorsport and track builds, decat downpipes deliver maximum exhaust flow, aggressive sound, and top-end power gains.

Conclusion

Upgrading your BMW 4-Series F32 with performance downpipes is one of the most effective ways to unleash hidden power, improve turbo response, and enhance your exhaust tone. Whether you choose catted for refined daily driving or decat for uncompromised track performance, our range of BMW F32 downpipes guarantees premium build quality, precise fitment, and proven performance gains. Transform your F32 today.