BMW S55 Twin-Turbo Catless PCZ Downpipes

Wake Up the Monster: PCZ BMW S55 Twin-Turbo Catless Downpipes

The S55 engine is a masterpiece, but the factory exhaust routing chokes its true potential. The PCZ S55 Catless Downpipe Upgrade completely removes that restriction right at the turbochargers. Engineered specifically for the 3.0L Twin-Turbo F80 M3, F82/F83 M4, and M2 Competition, this dual-downpipe set unlocks the raw, aggressive inline-six rasp and aggressive spool sound your M car should have had from the factory.

Crafted with premium, heavy-duty stainless steel and precision smooth-radius bends, this setup maximizes exhaust velocity, slashes backpressure, and sets the stage for massive hardware power upgrades.

Massive Performance Gains (Stage 2 Mandatory)

If you want to push your S55 past the factory limits, deleting the restrictive primary catalytic converters is non-negotiable. When paired with a Stage 2 ECU software calibration (e.g., Bootmod3 or MHD), the numbers speak for themselves:

• Power Boost: Expect massive dyno-proven gains of +50 to +70+ horsepower depending on your fuel quality (such as 98 RON or full E85 blends).

• Torque Unleashed: Adds an incredible +80 to +110+ Nm of torque, delivering a brutal, neck-snapping midrange pull.

• Instantaneous Spool: Noticeably reduces turbo lag, allowing the twin mono-scroll turbos to build boost instantly when you drop your foot.

⚠️ Important CEL Notice: Because this is a high-flow, track-oriented catless racing system, installing it will trigger a Check Engine Light (CEL) on a stock ECU. To disable the error and unlock the full power potential safely, a software tune / stage upgrade is required.

Professional installation is highly recommended due to the tight clearances on the S55 chassis. For off-road and track use only.

Why Run PCZ S55 Downpipes?

• Uncompromising M Acoustic: Delivers a deep, mechanical, track-ready exhaust note under load, complete with aggressive lifting burbles and cracks.

• True 3-Inch Smooth Flow: Mandrel-bent piping ensures zero neck-downs or internal turbulence, optimizing exhaust gas velocity.

• Enduring Build Quality: Built to survive intense thermal expansion, track-day heat cycles, and real-world elements without warping.

• Perfect Precision Fit: Retains all factory O2 sensor placement positions and mounts directly to the OEM mid-pipes.

Vehicle Fitment Guide

This dual-downpipe kit is a direct bolt-on replacement for models equipped with the S55 3.0L Twin-Turbo Inline-6 engine:

• M3 Sedan (2015 – 2018)

  • F80 M3 / M3 Competition

• M4 Coupe & Convertible (2015 – 2020)

  • F82 / F83 M4, M4 Competition, M4 CS

• M2 Coupe (2018 – 2021)

  • F87 M2 Competition (Note: Does not fit standard N55 single-turbo M2)

We ship Australia-wide using premium couriers to ensure your mods arrive safe and fast.

• Dispatch: 1–5 Day Turnaround
• Transit: 4–10 Business Days (Regional may vary)
• Secure: Signature on delivery available for high-value carbon parts.
• Local: Shipping directly from our Victoria warehouse.

Important: Please inspect your parts and report any transit damage within 48 hours so we can fast-track a resolution for you.