BMW F06/F12/F13 M6 Catless Downpipes – Straight-Pipe Design for Maximum Flow, Horsepower Gains & Aggressive Exhaust Sound | Fits M6 Gran Coupé, Coupé & Convertible with S63 4.4L Twin-Turbo V8 Engine (2012–2018)

Unlock deeper tone, faster spool, and raw power with the BAVMODS® Dual Catless Downpipes — precision-engineered for the BMW FXX M6’s S63 4.4L Twin-Turbo V8.

From the factory, the S63’s exhaust system is heavily restricted by dual catalytic converters that choke airflow, trap heat, and build backpressure. The BAVMODS® Dual Catless Downpipes remove those bottlenecks completely — allowing your twin turbos to breathe freely, spool faster, and produce that unmistakable M5 thunder.

Engineered for Maximum Turbo Efficiency & Power

Built from high-grade T304 stainless steel and TIG-welded for long-term durability, these downpipes deliver true straight-through flow from both turbochargers. Each pipe is mandrel-bent to maintain a consistent diameter — maximizing exhaust velocity and reducing backpressure across the entire rev range.

Key Performance Benefits:

• Dual 4” Free-Flow Design: Unleashes both turbochargers for balanced, unrestricted exhaust flow.
• Massive Horsepower & Torque Gains: +35–55 HP and +50–70 lb-ft of torque when paired with a Stage 2 tune.
• Faster Turbo Spool: Boost builds earlier and holds stronger through higher RPMs.
• Aggressive Exhaust Note: Deep, rumbling tone at idle with explosive pops and crackles under load.
• Lower EGTs & Heat Soak: Improves thermal efficiency and protects turbo longevity.
• Precision TIG-Welded Construction: Leak-free performance under extreme pressure.
• OEM+ Fitment: Direct bolt-on using factory O₂ sensor placements and mounting points.

Complete Plug-and-Play Installation Kit

Everything you need for a perfect, clean install is included — no cutting or modification required.

Includes:

• Dual stainless downpipes (left & right turbo outlets)
• O₂ sensor holes pre-drilled
• Heavy-duty gaskets, clamps, and mounting hardware

Pair with an ECU tune for maximum power gains and CEL management (Check Engine Light).

Why Go Catless?

A catless setup is the most transformative exhaust upgrade for any twin-turbo M car. By eliminating restrictive catalytic converters, you allow the S63’s twin turbos to:

• Flow more exhaust volume with less resistance
• Reduce backpressure and turbo lag
• Lower under-hood temperatures
• Unlock tuning potential for higher boost targets

The result: a sharper, meaner, more responsive M5 that sounds every bit as powerful as it drives.

Performance You Can Hear and Feel

From the first cold start to wide-open throttle, the BAVMODS® Dual Catless Downpipes redefine the M6 experience.

Expect instant spool, a deeper growl, and a ferocious top-end roar that transforms every drive into an event.

Your S63 deserves freedom — not restriction.

FITMENT: BMW M6 Gran Coupé (F06) – 2013 to 2018, BMW M6 Coupé (F13) – 2012 to 2018, BMW M6 Convertible (F12) – 2012 to 2018, BMW M6 Competition (F06 / F12 / F13) – 2014 to 2018, BMW M6 CS (F13) – 2018.

ENGINE COMPATIBILITY: S63B44T0 – 4.4L Twin-Turbocharged V8

MATERIAL: High-Grade T304 Stainless Steel (TIG-Welded, Mandrel-Bent, Dual Configuration)

Please refer to the “Fitment” section in the product description for compatibility details.