BMW M4 (F82) Coupe 3" Primary De-Cat Downpipe Performance Exhaust

Unleash the S55 soundtrack and response with these 3 inch catless turbo front pipes for the F82 BMW M4 Coupe. Crafted by Cobra Sport from premium T304 stainless steel in 76.2 mm bore, this primary catalyst delete frees up back pressure for quicker turbo spool, sharper throttle feel and a deeper, more aggressive tone. Ideal for those chasing a proper motorsport sound and the perfect foundation for a Stage 2 calibration.

Fitment and compatibility

• For BMW M4 F82 Coupe only, pre-PPF vehicles.
• Not suitable for the M4 Competition model.
• Direct connection to the factory system and also compatible with the Cobra Sport primary cat-back, part code BM104TP84.
• Replaces the primary catalytic converters only primary cat bypass.

What you get

• Pair of 3 inch 76.2 mm catless turbo downpipes in T304 stainless steel.
• All required clamps and fittings supplied, except 2 x BMW gaskets.
• Requires 2 x genuine BMW gasket, part number 18307851168 not included.

Why enthusiasts choose this upgrade

• Catless primary section reduces restriction for faster turbo spool and improved throttle response.
• Deeper, richer exhaust note that complements the twin turbo straight six S55 engine.
• High quality construction designed for performance builds and track-driven cars.
• The ideal pairing with a performance remap for significant performance potential.

Important information

• For motorsport and off road use only worldwide.
• Removing the original primary catalysts may trigger an EML check engine light. An ECU recalibration is recommended to resolve the warning and optimise the gains.

Professional installation

We offer fitting at MJ Modifications in Warwickshire, with extensive hands-on experience installing these on customer cars. For a tailored install quote, email info@mjmodifications.co.uk.

Search-friendly info for buyers

BMW M4 F82 decat front pipes. S55 primary cat delete downpipes. Catless turbo pipes for M4 Coupe. 3 inch stainless performance front section. Cobra Sport M4 downpipes compatible with OEM exhaust and Cobra Sport cat-back BM104TP84. Ideal for remapped Stage 2 setups, track day builds and drivers seeking a louder exhaust note, stronger mid-range and improved flow. Requires BMW gasket 18307851168.