Top Speed Pro-1 BMW F80 M3 / F82 M4 200-Cell High-Flow Catted Turbo Downpipes with Heat Shield (2015–2020)

Top Speed Pro-1 200-Cell High-Flow Catted Turbo Downpipes with Heat Shield

BMW F80 M3 / F82 M4 (2015–2020) | 3.0L Twin-Turbo S55

Upgrade your BMW M3 or M4 with the Top Speed Pro-1 high-flow catted turbo downpipes, engineered specifically for the F80 M3 and F82 M4 platforms equipped with the 3.0L twin-turbo S55 engine. Constructed from premium T304 stainless steel, these downpipes feature 200-cell high-flow catalytic converters and OEM-style integrated heat shielding to optimize exhaust flow, reduce turbo lag, and improve overall performance.

Designed for enthusiasts seeking increased power while maintaining catalytic functionality, this setup delivers faster turbo spool, improved throttle response, and a noticeably deeper, more aggressive exhaust note under acceleration.

Key Features

• 200-cell high-flow catalytic converters – performance-focused with emissions-conscious design
• T304 stainless steel construction – corrosion-resistant and TIG-welded
• OEM-style heat shielding – helps reduce engine bay temperatures
• Bolt-on fitment – direct replacement for factory downpipes
• Improved turbo spool and throttle response
• Aggressive sound enhancement under load while retaining drivability
• Actual product photos included

Vehicle Fitment

• BMW F80 M3 Sedan (2015–2018)
• BMW F82 M4 Coupe (2015–2020)
• Compatible with all S55 3.0L twin-turbo inline-6 engines
• May fit BMW F83 M4 Convertible (confirmation recommended)

Important Notes

• Designed for off-road or track use only in some regions
• Professional installation is highly recommended
• Please verify local and state emissions regulations before purchase

Frequently Asked Questions

Will these downpipes fit my BMW?
Yes. They are designed for BMW F80 M3 and F82 M4 models from 2015–2020 with the S55 engine. Fitment for the F83 M4 Convertible should be confirmed prior to purchase.

Are these downpipes emissions legal?
These are high-flow catalytic downpipes and may not be street legal in all regions. Please check your local emissions and inspection requirements.

What are the benefits of 200-cell catalytic converters?
200-cell high-flow cats provide improved exhaust flow and performance while offering better emissions control than catless options.

Do the heat shields make a difference?
Yes. Integrated heat shielding helps lower underhood temperatures and protects surrounding components, which is especially important on turbocharged engines.

Will the sound change?
Yes. Expect quicker turbo spool and a deeper, more aggressive exhaust tone under throttle, while idle and cruising volume remain controlled.

Is professional installation required?
Professional installation is strongly recommended due to the complexity of twin-turbo downpipe installation.