Fusion Motorsport Fabrications G8x Secondary Cat Pipes (2020+)

Fusion Motorsport Fabrication BMW G8X (2020+) 304 Stainless Steel Secondary Cat Pipes

Looking to improve exhaust flow on your BMW G80 M3 or G82/G83 M4 without sacrificing emissions compliance? Fusion Motorsport Fabrication's 304 stainless steel secondary cat pipes reduce restriction downstream of the factory primary cats, improving power and throttle response while keeping your car emissions-legal and daily-drivable.

Built for enthusiasts who want a noticeable gain in exhaust tone and efficiency without the drone or emissions trade-offs of a full catless system, these secondary cat pipes retain the factory primary cats for a balanced, streetable upgrade.

Key Features

• High-Quality 304 Stainless Steel — Corrosion-resistant and built for long-term durability.
• Smooth, High-Flow Design — Reduces restriction for improved power and throttle response.
• OEM Fitment — Direct bolt-on design for integration with the stock or aftermarket exhaust system.
• Refined Exhaust Note — Enhances sound without excessive drone, keeping daily drivability intact.
• Retains Factory Primary Cats — Delivers a performance gain while maintaining emissions compliance.

Compatible BMW Applications

• BMW G80 M3 (2020+)
• BMW G82 M4 (2020+)
• BMW G83 M4 (2020+)

Product Specifications

• Brand: Fusion Motorsport Fabrication (FMF)
• Product Type: Secondary cat pipes
• Material: 304 stainless steel
• Vehicle Fitment: 2020+ BMW G80 M3, G82/G83 M4
• Installation Type: Direct bolt-on
• Emissions: Retains factory primary cats for compliance

Frequently Asked Questions

What do secondary cat pipes do on a BMW G8X M3/M4?

Secondary cat pipes replace the restrictive factory secondary catalytic converters downstream of the primary cats, improving exhaust flow and throttle response while the factory primary cats remain in place for emissions compliance.

Are these emissions-legal?

These pipes retain the factory primary cats, which helps maintain emissions compliance compared to a full catless setup. Always check your local emissions regulations before installing aftermarket exhaust components.

Will these fit my G80 M3 or G82/G83 M4?

Yes, these secondary cat pipes are designed as a direct bolt-on fitment for 2020-and-later BMW G80 M3 and G82/G83 M4 models.

Will these make my car louder?

They enhance the exhaust note for a more refined, aggressive sound without excessive drone, keeping the car comfortable for daily driving.

Fusion Motorsport Fabrication — Precision-built components for serious exhaust fabrication.