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HFE BMW M3 F80 S55 Decat Downpipes 3" – Performance Exhaust Upgrade
HFE BMW M3 F80 S55 Decat Downpipes 3" – Performance Exhaust Upgrade
HFE BMW M3 F80 S55 Decat Downpipes 3" – Performance Exhaust Upgrade
HFE BMW M3 F80 S55 Decat Downpipes 3" – Performance Exhaust Upgrade
HFE BMW M3 F80 S55 Decat Downpipes 3" – Performance Exhaust Upgrade
HFE BMW M3 F80 S55 Decat Downpipes 3" – Performance Exhaust Upgrade

HFE BMW M3 F80 S55 Decat Downpipes 3" – Performance Exhaust Upgrade

£499.99£275.00

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High Flow Engineering S55 Decat Downpipes Performance Exhaust Upgrade

Unlock the full performance potential of your BMW M3 F80 with the HFE S55 3" Decat Downpipes. By replacing the restrictive factory catalytic converters, these high-flow downpipes significantly reduce exhaust backpressure, improve turbo efficiency, and allow the S55 twin-turbo engine to deliver stronger performance and sharper throttle response, particularly on tuned vehicles.

⚠ IMPORTANT – ROAD USE, EMISSIONS & MOT NOTICE

These decat downpipes remove the factory catalytic converters and are intended for off-road or motorsport use only. They are not UK emissions compliant and will result in a UK MOT emissions failure. ECU tuning is strongly recommended after installation.

Key Features＋
  • High-Flow 3" Decat Design: Eliminates restrictive OEM catalytic converters.
  • Improved Turbo Response: Reduced backpressure allows faster spool.
  • Performance-Grade Stainless Steel: Built to withstand extreme exhaust temperatures.
  • Mandrel-Bent Tubing: Smooth internal flow for optimal gas evacuation.
  • Enhanced Exhaust Note: Deeper and more aggressive sound under acceleration.
  • Direct-Fit Installation: Designed as a direct OEM replacement.
Why Upgrade S55 Downpipes?＋
  • The factory catalytic converters are a major restriction on tuned S55 engines.
  • Improves throttle response and mid-range torque.
  • Essential supporting modification for Stage 2 builds.
  • Optimises exhaust gas flow at high RPM.
  • Pairs perfectly with upgraded intakes, charge pipes and intercoolers.
Technical Specifications＋
  • Material: High-grade 304 stainless steel
  • Configuration: Decat (no catalytic converters)
  • Construction: Mandrel bent & welded
  • Fitment: Direct OEM replacement
  • Engine: S55 Twin Turbo
Vehicle Compatibility＋
  • BMW M3: F80 Saloon (2014–2020)

✔ S55 twin-turbo engine only
✔ Compatible with factory and most aftermarket exhaust systems
✔ ECU tuning required

Installation＋
  • Remove factory downpipes and catalytic converters.
  • Install HFE decat downpipes using OEM mounting points.
  • Check clearances and tighten all connections securely.
  • ECU remapping required before driving.
  • Professional installation strongly recommended.
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⚠️ DISCLAIMER Unless explicitly stated otherwise, all products sold by DC Prestige Online LTD are designated race-only and are solely for competition or off-road use limited to racing formally sanctioned by a recognized racing organization. Any other use, including recreational off-road use, may be in violation of local, state, and Federal laws. DC Prestige Online LTD does not implicitly or explicitly confirm the legality of using any products it sells on public roads; that is entirely the responsibility of the consumer. Read our full terms of service here.

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Last updated: 07/09/2025

We want you to be confident when shopping with us. This page explains your rights and our terms for deliveries, returns, refunds, exchanges, and digital products. It applies to UK and international customers.

1. Standard Returns (UK & International)

  • Notify us within 14 calendar days of receiving your order if you wish to return.
  • Once approved, you have a further 14 days to send the goods back.
  • Items must be unused, uninstalled, and in original packaging, with proof of purchase.
  • Refunds are processed to your original payment method within 14 days of receiving goods (or proof of postage).

Note: Standard delivery costs will be refunded; upgraded shipping (e.g., next-day) is non-refundable. You are responsible for return postage unless the item is faulty, damaged, or incorrect. Used, installed, or damaged goods beyond reasonable inspection may incur up to 50% deduction from the refund.

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  • Cancellations or changes made less than 48 hours before your installation appointment will forfeit your fitting deposit.
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  • International customers agree to the same terms.

9. How to Start a Return

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HFE BMW M3 F80 S55 Decat Downpipes 3" – Performance Exhaust Upgrade