BMW 4-Series G82 Downpipes – Catted & Decat Performance Exhaust Upgrades

( number of products: 14 )

Upgrade your BMW 4-Series G82 M4 with premium performance downpipes. Choose between catted or decat options in stainless steel or titanium to boost horsepower, improve turbo spool, and unleash an aggressive motorsport exhaust tone.

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BMW 4-Series G82 Downpipes – Unleash the Full Potential of Your M4

The BMW 4-Series G82 M4, launched in 2021, is one of BMW’s most advanced and powerful sports coupes. Powered by the 3.0L twin-turbo S58 engine, the G82 delivers blistering performance straight from the factory. However, the restrictive OEM downpipes limit exhaust flow, holding back your car’s true potential. Upgrading to performance BMW G82 downpipes is one of the most effective modifications to boost horsepower, reduce turbo lag, and achieve a deeper, motorsport-inspired exhaust sound.

Why Upgrade to Performance BMW G82 Downpipes?

The factory-installed downpipes are designed to comply with emissions and noise regulations but sacrifice flow and turbo efficiency. Installing high-performance BMW 4-Series G82 downpipes provides multiple advantages:

  • Significant horsepower and torque gains – optimized flow reduces backpressure, allowing the S58 engine to perform at its best.
  • Faster turbo spool – enjoy sharper throttle response, reduced turbo lag, and stronger acceleration.
  • Enhanced exhaust tone – catted downpipes provide a refined, sporty sound, while decat downpipes deliver an aggressive, motorsport-inspired roar.
  • Lower exhaust gas temperatures – improved efficiency protects vital components under high-performance driving.
  • Perfect for ECU tuning – essential for Stage 1, Stage 2, and hybrid turbo builds.

Types of BMW 4-Series G82 Downpipes

Our range of BMW G82 downpipes is designed to suit various driving styles and tuning goals:

Catted BMW G82 Downpipes

Catted downpipes feature a high-flow sports catalytic converter that balances emissions compliance with increased performance. Perfect for daily-driven cars in regions with strict emissions regulations.

Decat BMW G82 Downpipes

Decat downpipes remove the catalytic converter entirely, maximizing exhaust flow and unlocking peak performance. Best suited for off-road, track-focused builds, or areas without emissions testing.

Material Options: Stainless Steel & Titanium

The material of your BMW G82 downpipes affects weight, durability, and thermal performance:

  • Stainless steel downpipes – durable, corrosion-resistant, and cost-effective; suitable for most builds.
  • Titanium downpipes – ultra-lightweight, superior heat management, and a premium motorsport-grade finish.

Engine Compatibility

Our BMW 4-Series G82 downpipes are designed specifically for the powerful S58 engine found in the M4 lineup:

  • BMW M4 G82 Downpipes – engineered for the standard M4 models.
  • BMW M4 G82 Competition Downpipes – optimized for the higher-output S58 variant.
  • BMW M4 CSL G82 Downpipes – designed for extreme-performance, limited-edition models.
  • BMW xDrive G82 Downpipes – seamless integration for AWD models, ensuring perfect fitment.

Performance Gains with BMW G82 Downpipes

Installing performance BMW G82 downpipes delivers instant improvements in power and response. Typical gains include:

  • +30–50 HP with the downpipes alone.
  • +70–100 HP when paired with Stage 2 ECU tuning.
  • Substantial torque gains throughout the rev range.
  • Sharper throttle response and faster turbo spool.

Choosing the Right Diameter

Pipe sizing plays a key role in optimizing power delivery:

  • 3-inch downpipes – perfect for Stage 1 and Stage 2 tuning.
  • 3.5-inch downpipes – recommended for hybrid turbo upgrades and extreme-performance builds.

All our BMW G82 downpipes are designed for direct bolt-on installation, ensuring a perfect fit without cutting or welding.

Build Quality & Engineering

Our performance BMW G82 downpipes are engineered to the highest standards for motorsport-grade performance:

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

Tuning Potential

Pairing your BMW G82 downpipes with ECU tuning unlocks their full potential:

  • Substantial horsepower and torque gains.
  • Optimized turbo boost and fuel management.
  • Customizable exhaust sound profiles with catted or decat options.
  • Supports Stage 1, Stage 2, and hybrid turbo setups.

Daily Driving vs Track Builds

For everyday use, catted downpipes offer the perfect balance between emissions compliance and enhanced performance. For track-focused builds, decat downpipes deliver maximum flow, raw motorsport sound, and ultimate power gains.

Conclusion

Upgrading your BMW 4-Series G82 M4 with performance downpipes is one of the most effective ways to unlock hidden power, improve turbo response, and elevate your exhaust tone. Whether you choose catted for refined street use or decat for uncompromised track performance, our range of BMW G82 downpipes guarantees premium build quality, precise fitment, and proven gains. Transform your M4 G82 today.

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