BMW G8X M3/M4 S58 Decat Downpipes Cat Delete Catless Primary Race Pipes - High-Flow Stainless Straight-Through Turbo Outlet - Direct Bolt-On Stage 2 Tune Ready - Fits G80 M3 G82/G83 M4

Cat Delete Primary Downpipes for BMW G8x S58

Unlock the full character of your twin turbo S58 with race-focused primary pipes that let the engine breathe and respond the way it should. Expect crisper throttle, faster boost build and a fiercer soundtrack that transforms every drive. Crafted from durable stainless steel and designed for an OEM-like fit, this upgrade replaces the factory restrictive sections to cut backpressure and unleash real performance gains.

Why enthusiasts choose this upgrade

• Free-flow turbo outlet pipes that reduce exhaust restriction for stronger mid-range pull
• Noticeably deeper, more aggressive tone with increased volume under load
• Ideal foundation for Stage II remaps and advanced ECU calibration
• Bolt-on installation with the required fittings supplied for a tidy, secure fit
• Precision built stainless system for reliability and heat resilience

Proven on our own builds

We run these on our shop projects and customer cars with excellent feedback. Drivers report a livelier feel, quicker spool and a more engaging exhaust note without compromising day-to-day drivability when paired with the right calibration.

Compatibility

Designed for the BMW G8x platform using the S58 engine:

• G80 M3
• G82 M4
• G83 M4 Convertible

Tuning potential

Perfect for owners planning a Stage II tune, these race downpipes remove the main exhaust restriction so your tuner can safely optimise boost, timing and torque delivery. More efficient flow means more headroom and better turbo efficiency.

Installation and fitting

Supplied as a bolt-on kit with the additional hardware needed for a clean install. No cutting or welding required.

Want it fitted for you Contact MJ Modifications in Warwickshire for professional installation. Request a quote at info@mjmodifications.co.uk.

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For off-road and motorsport use only where applicable.