BMW M4 (F82) Coupe S55 3" Primary Decat/Cat Delete Downpipes - Catless Front Pipes Turbo Outlet Straight Pipe, Non-OPF Pre-PPF, Stage 2 Track/Race Performance Exhaust Upgrade, OEM Fit (UK)

Unlock raw S55 performance with our race-only primary cat delete front section for the BMW M4 F82 Coupe. This high-flow turbo outlet pipe replaces the restrictive front catalysts to unleash a harder-hitting soundtrack, faster turbocharger spool and razor-sharp throttle response. Ideal for enthusiasts chasing maximum flow, Stage 2 tuning and serious track-day performance.

• Direct-fit front pipes for the F82 M4 Coupe non-OPF non-PPF models
• 3 inch 76.2 mm mandrel-bent tubing for superior gas velocity and reduced back pressure
• Catless primary section for maximum flow and quicker spool-up
• Deeper, more aggressive exhaust tone under load with crisp turbo spool noises
• Perfect foundation for ECU calibration and Stage 2 mapping
• Precision-built for a factory-style install using existing mounting points

Fitment and compatibility

• BMW M4 F82 Coupe with S55 engine, pre-PPF models only
• Connects to the standard factory rear system
• Also mates to Cobra Sport primary cat-back system part number BM104TP84
• Not suitable for the M4 Competition

Required parts and what is included

• Requires 2 x BMW gasket part number 18307851168 not included
• All other relevant fittings and hardware are supplied

Real-world results

On our own builds and customer cars, this primary cat delete has delivered a noticeable increase in urgency, stronger mid-range punch and a far more exciting soundtrack. Pair it with a quality remap to fully capitalise on the extra flow potential and to keep the engine management light in check.

Tuning and CEL information

• Removing the original primary catalysts can trigger a check engine light CEL
• We recommend an ECU recalibration remap to optimise fuelling, stabilise trims and clear any catalyst efficiency codes

Why choose MJ Modifications

• Trusted UK supplier of BMW performance upgrades and exhaust parts
• Professional installation available at MJ Modifications in Warwickshire
• Email info@mjmodifications.co.uk for a fitting quote
• Enthusiast-approved with excellent customer feedback for sound quality, fit and finish

Search-friendly terms customers use

BMW M4 F82 primary cat delete, S55 downpipes UK, M4 F82 catless downpipe, BMW M4 race downpipe, M4 turbo down pipe upgrade, BMW M4 decat front pipes, F82 exhaust mod, S55 cat bypass, BMW M4 straight pipe front section, M4 F82 performance exhaust upgrade.

Important usage notice

This cat delete primary section is for motorsport and off-road use only worldwide. Not for road use. Pre-PPF vehicles only.