PERFORMANCE WITHOUT COMPROMISE
UPGRADE YOUR EMISSIONS SYSTEM TODAY -
EXPERIENCE OUR NEW GEN1+GEN2 ADVANCED MODELS!
INTRODUCING
G-SPORT BY GESi®
Industry-Leading High-Performance Catalytic Converters
The GESi® Advantage represents North American-built emissions solutions emphasizing the highest quality and performance.
As a leader in EPA-compliant emissions control systems, we specialize in manufacturing high-flow metallic substrates, applying advanced precious metal coatings, and in-house substrate canning. Our complete, end-to-end process delivers premium, high-performance catalytic converters designed for aftermarket applications. We have defined this as our C3 Process.

The GESi Advantage & Our C3 Process
Our proven S-Wound substrate technology can now be found in both Gen1 & Gen2 High-Flow Catalytic Converter product lines. These Metallic substrates are furnace-brazed to provide long-term performance and emissions control.
Our Coating process includes proprietary wash coat technology based on GEN1 or GEN2 applications that are designed to achieve stronger molecular bond to metallic surfaces with performance and emissions control in mind.
In-house Canning features our Double-Lock technology to ensure the catalytic core and mantle are locked in place, with core-only models now available up to 6″ OD ready for custom exhaust integration.
Experience the Advanced Emissions Reduction Capabilities of a G-Sport High Flow Catalytic Converters
Carbon Monoxide Emissions Reduction up to - (99%)
Nitrogen Oxide Emissions Reduction up to - (98%)
Hydrocarbons Emissions Reduction up to - (95%)
G-Sport GEN2 Advanced Series
To support the latest emissions standards, GESi® introduced GEN2 Advanced high-flow cats with a proprietary coating technology incorporating our proven S-Wound core with the largest 6″ core and NEW Diesel Oxidation Catalyst and Mid-Bed Catalyst solutions coming soon!
GEN2 Series EPA Compliant models for vehicles 2017 and newer
Capable of supporting up to 1,200 HP per converter
Custom designed S-wound core for improved strength & performance
New proprietary coating to meet latest emissions regulations
High quality Stainless Steel construction throughout
Double-Lock technology ensures substrate is locked in place
Ideal for forced induction and capable of withstanding spikes of up to 1,600F/ 875C
Introducing NEW GEN1 Advanced Series High Performance Catalytic Converters for up to 800hp Applications!
New S-Wound Core For Added Performance & Longevity.
Introducing NEW GEN1
Advanced Models!
For years, our emissions solutions have been addressing the needs of the high-flow exhaust market. Our NEW GEN1 Advanced line of high-flow catalytic converters offers purpose-built catalytic converter solutions for high-performance applications up to 2016 model year vehicles with our proven S-Wound Core offering minimal or no loss in horsepower.
GEN1 Advanced series supports vehicles up to 2016 model year
EPA Compliant - for use on OBD1/OBD2 Vehicles (1996 to 2016)
High quality Stainless Steel construction throughout
NEW S-Wound Core with same high-flow performance
Proprietary precious metal wash coat delivers consistent emissions reduction
Ideal for forced induction and capable of withstanding spikes of up to 1,600F/ 875C
Global Emissions Systems - Made Locally
High Flow Catalytic Converters Proudly Made in North America.
