Catalytic Converters & Accessories — G-Sport by GESi®
G-Sport by GESi® builds high-flow catalytic converters that give up nothing: in instrumented dyno testing, a properly sized G-Sport cat matched a straight pipe line for line, while cutting carbon monoxide up to 99%. Every converter is built in North America around GESi's furnace-brazed S-Wound metallic substrate, Double-Lock canned in stainless steel, and (outside the dedicated race line) EPA compliant — street-legal performance outside CARB states.
The line is organized by generation and application: Gen1 (300 CPSI) for 1996–2016 vehicles, Gen2 (400 CPSI) for 2017 and newer with tiers to 1,200hp, OEM-style Mid-Bed dual-brick converters, Non-EPA race converters, Diesel Oxidation Catalysts, and Transition Cones for core-only builds. New to the lineup? Start with Understanding the G-Sport Catalytic Converter Lineup.
Founded by record-breaking NHRA Pro Mod driver Eric Latino, GESi has engineered emissions solutions for high-horsepower builds since 2001 — and as a G-Sport Preferred Vendor, Ace Race Parts keeps the full line stocked in our Washington warehouse for same-day shipping.
Read LessG-Sport Gen1 HO EPA Compliant Catalytic Converter - 2.500" Inlet/Outlet (50022)
Also available in: 3.000" Inlet/Outlet (50032) | Fabricator 6-Pack (650022) EPA-COMPLIANT HIGH-FLOW PERFORMANCE FOR 1996–2016 VEHICLES — G-SPORT GE...
View full detailsG-Sport Gen1 HO EPA Compliant Catalytic Converter - 3.000" Inlet/Outlet (50032)
Also available in: 2.500" Inlet/Outlet (50022) | Fabricator 6-Pack (650032) EPA-COMPLIANT HIGH-FLOW PERFORMANCE FOR 1996–2016 VEHICLES — G-SPORT GE...
View full detailsG-Sport Gen1 UHO EPA Compliant Catalytic Converter - 3.000" Inlet/Outlet (85032)
Also available in: 4.000" Inlet/Outlet (85042) | Fabricator 6-Pack (685032) 850HP OF EPA-COMPLIANT FLOW FOR 1996–2016 VEHICLES — G-SPORT GEN1 ADVAN...
View full detailsG-Sport Gen1 UHO EPA Compliant Catalytic Converter - 4.000" Inlet/Outlet (85042)
Also available in: 3.000" Inlet/Outlet (85032) | UHO Core 6-Pack (685002) 850HP OF EPA-COMPLIANT FLOW FOR BIG-BORE EXHAUST SYSTEMS — G-SPORT GEN1 A...
View full detailsG-Sport Gen1 HO EPA Compliant Catalytic Converter Core - 4.000" Body x 4.000" Long (50002)
Also available: UHO 4.500" Core (85002) | Fabricator 6-Pack (650002) EPA-COMPLIANT CORE-ONLY FLOW FOR CUSTOM EXHAUST BUILDS — G-SPORT GEN1 ADVANCED...
View full detailsG-Sport Gen1 UHO EPA Compliant Catalytic Converter Core - 4.500" Body x 4.000" Long (85002)
Also available: HO 4.000" Core (50002) | Fabricator 6-Pack (685002) 850HP OF EPA-COMPLIANT FLOW, CORE ONLY — G-SPORT GEN1 ADVANCED UHO CORE The G-S...
View full detailsG-Sport Gen1 UHO EPA Compliant Catalytic Converter 6 Pack - 3.000" Inlet/Outlet (685032)
Also available: Single unit (85032) | HO 6-Pack in 3.000" (650032) FABRICATOR 6-PACK — G-SPORT GEN1 ADVANCED UHO CATALYTIC CONVERTERS, 3.000" This ...
View full detailsG-Sport Gen1 UHO EPA Compliant Catalytic Converter Core 6 Pack - 4.500" Body x 4.000" Long (685002)
Also available: Single core (85002) | HO Core 6-Pack (650002) FABRICATOR 6-PACK — G-SPORT GEN1 ADVANCED UHO CATALYTIC CONVERTER CORES, 4.500" BODY ...
View full detailsG-Sport Gen1 HO EPA Compliant Catalytic Converter 6 Pack - 3.000" Inlet/Outlet (650032)
Also available: Single unit (50032) | 6-Pack in 2.500" (650022) FABRICATOR 6-PACK — G-SPORT GEN1 ADVANCED HO CATALYTIC CONVERTERS, 3.000" This list...
View full detailsG-Sport Gen1 HO EPA Compliant Catalytic Converter 6 Pack - 2.500" Inlet/Outlet (650022)
Also available: Single unit (50022) | 6-Pack in 3.000" (650032) FABRICATOR 6-PACK — G-SPORT GEN1 ADVANCED HO CATALYTIC CONVERTERS, 2.500" This list...
View full detailsG-Sport Gen1 HO EPA Compliant Catalytic Converter Core 6 Pack - 4.000" Body x 4.000" Long (650002)
Also available: Single core (50002) | UHO Core 6-Pack (685002) FABRICATOR 6-PACK — G-SPORT GEN1 ADVANCED HO CATALYTIC CONVERTER CORES, 4.000" BODY ...
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