🔧 Understanding the G-Sport Catalytic Converter Lineup

When it comes to high-performance exhaust systems, the catalytic converter is one of the most critical components. At G-Sport by GESI®, the mission is clear: deliver catalytic converters that combine durability, compliance, and performance—without compromise. Whether you’re a professional fabricator, exhaust manufacturer, or performance shop, the G-Sport product line is engineered to provide the flexibility and reliability needed across a wide range of applications.

All G-Sport catalytic converters are manufactured in North America and feature full stainless-steel construction for long-term strength and corrosion resistance.

EPA-Compliant Technology

Most G-Sport catalytic converters (excluding select competition-only SKUs) are designed to meet U.S. EPA aftermarket requirements. That makes them legal for use in federally certified vehicles that are no longer covered under the OEM emissions warranty—key for customers seeking compliance without sacrificing performance.

G-Sport offers two main product generations, each tailored for different vehicle needs:

Gen1 Advanced Series (300 CPSI)

• EPA-compliant
• Proven S-Wound substrate design
• Optimized for 2016 and older model year vehicles
• Lower cell density reduces backpressure and improves exhaust flow
• Ideal for street-driven and performance builds on less sensitive OBD2 platforms

Best for: Street and performance vehicles 2016 and older where reduced exhaust restriction is a priority and emissions monitoring is less demanding.

Gen2 Advanced Series (400 CPSI)

• EPA-compliant
• Proven S-Wound substrate design
• Required for 2017 and newer vehicles to prevent CELs (Check Engine Lights)
• Higher cell density for faster light-off and compatibility with modern emissions monitoring
• Compatible with all model years

Best for: Newer vehicles or any build that requires maximum compatibility with today’s advanced emissions systems.

Mid-Bed Catalytic Converters

Many OEM converters use a dual-brick layout with an oxygen sensor positioned between the bricks. To support these systems, G-Sport offers Mid-Bed configurations in UHO (4.5") and UHO+ (5.0") diameters.

• Two separate catalyst bricks housed within a single shell
• Preserves OEM-style layout and emissions characteristics
• Available as substrate-only or as a complete assembly with 3" transition cones

Best for: OEM-style builds or emissions-sensitive applications where duplicating factory layout is important.

Performance Tiers by Horsepower Rating

Selecting the right G-Sport converter also depends on your horsepower target. Each diameter and generation is engineered to handle specific power levels while maintaining emissions compliance and durability.

All G-Sport catalytic converters are built with high-performance applications in mind. The primary differences between models are cell density, emissions compatibility, and horsepower rating—ensuring there’s an option tailored to every build.

Transition Cone Options

To simplify integration into custom exhaust systems, G-Sport catalytic converters can be paired with a variety of transition cones. These cones adapt converter bodies to different tubing diameters for a precise fit and smooth exhaust flow.

These options provide flexibility for 2.5", 3", and 4" exhaust tubing systems, allowing for clean and efficient fabrication across a wide range of custom builds.

Choosing the Right G-Sport Converter

• 2016 and Older Vehicles: Gen1 converters are ideal for street-driven and performance builds on older platforms where reduced restriction is a priority and emissions monitoring is less sensitive.
• 2017 and Newer Vehicles: Gen2 is often required to avoid check engine lights and maintain emissions compliance.
• OEM-Style Systems: Mid-Bed units provide the flexibility to replicate stock layouts with G-Sport’s performance benefits.

No matter which series you choose, G-Sport by GESI® delivers converters engineered for the highest levels of quality, compliance, and performance—making them a trusted choice for integrators and builders worldwide.