Top Speed Pro1 200 Cell HFC Turbo Downpipes with Heat Shield – BMW F80 M3 / F82 M4 (2015–2020)
Stainless Steel | High-Flow Catalytic | 3.0L Twin Turbo S55
Upgrade your BMW M3 or M4 with the Top Speed Pro1 High-Flow Catted Turbo Downpipes, engineered for the F80 M3 and F82 M4 (2015–2020) with the 3.0L twin-turbo S55 engine. These T304 stainless steel downpipes feature 200 cell high-flow catalytic converters and integrated thermal shielding, designed to improve exhaust flow, lower turbo spool time, and enhance overall performance.
Perfect for performance enthusiasts looking to retain emissions functionality while gaining power and a more aggressive sound under load.
Key Features:
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200 Cell High-Flow Catalytic Converters (HFC) – Performance-focused with emissions-conscious design
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T304 Stainless Steel Construction – Durable, corrosion-resistant, and TIG welded
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OEM-Style Heat Shielding – Reduces engine bay temps and improves efficiency
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Bolt-On Fitment – Direct replacement for OEM downpipes
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Faster Turbo Spool & Improved Throttle Response
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Aggressive Sound Enhancement – Noticeably deeper tone under acceleration
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Actual Product Photos Included
Vehicle Fitment:
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BMW F80 M3 Sedan (2015–2018)
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BMW F82 M4 Coupe (2015–2020)
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Compatible with all S55 3.0L Twin Turbo Inline-6 engines
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May also fit F83 M4 Convertible (confirm before purchase)
⚠️ Important Notes:
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Designed for off-road or track use only in some regions.
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Professional installation is highly recommended.
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Check local and state regulations regarding use of high-flow catalytic components.
❓ Frequently Asked Questions
Will these downpipes fit my BMW?
Yes, they fit BMW F80 M3 and F82 M4 models from 2015–2020 with the S55 3.0L twin-turbo engine. May also fit F83 M4 Convertible—please verify before purchase.
Are these downpipes emissions legal?
These are high-flow catalytic downpipes and may not be street legal in some regions. Please check your local emissions and inspection laws before installing.
What are the benefits of 200 cell cats?
200 cell high-flow catalytic converters improve exhaust flow and performance while reducing emissions compared to catless options. They offer a balance of power and drivability.
Do the heat shields actually make a difference?
Yes. The integrated heat shields help reduce underhood temperatures and protect surrounding components—especially valuable for turbocharged engines like the S55.
Will I notice a sound difference?
Yes. Expect a deeper, more aggressive tone under throttle and quicker turbo spool. Idle and cruising volume remain refined.
Is professional installation required?
Professional installation is highly recommended due to the precision and access required during downpipe installation on twin-turbo engines.
