Your Porsche Deserves Better Than a Cat Delete
Performance-minded GT3 owners don’t cut corners—especially on something as critical as exhaust flow and emissions.
Deleting cats might sound like the fastest way to power — but this sacrifices more than emissions compliance. G-Sport high-flow catalytic converters are specifically designed for high-revving, precision-tuned engines like the GT3’s.
Why a “Cat Delete” Falls Short
- Check-engine lights & inspections: Removing the catalysts often triggers CELs and can fail routine emissions checks.
- Unbalanced powerband: A straight-pipe can shift torque higher in the rev range, leaving the car flat at lower RPM—right where you want punch out of corners.
- Heat & durability concerns: Deleting the cat eliminates a critical thermal buffer, pushing more heat downstream to O₂ sensors and mufflers.
Enter the G-Sport Gen2 High-Flow Catalytic Converter Core (85600)
| Specifications | Benefits |
|---|---|
| 6.000" OD × 4.000" body | Large cross-section delivers generous flow while fitting within tight GT3 under-body packaging. |
| 400 CPSI S-Wound Core | Furnace-brazed, nickel-strip-lined core resists cracking and telescoping—even in sustained track sessions up to 1,200 hp. |
| Proprietary Wash Coat Technology | Designed to achieve stronger molecular bond to metallic surfaces with performance and emissions control in mind. |
| EPA-compliant | Third-party lab tested to meet U.S. federal emissions standards (excluding CARB regions), helping keep the CEL off with proper tuning. |
| 304 stainless construction & Double-Lock mantle | Long-term corrosion resistance and rock-solid core retention for street and circuit abuse. |
Chemistry 101: How It Works
G-Sport’s three-way catalyst targets the three main pollutants—Hydrocarbons, Nitrogen Oxides, and Carbon Monoxide—converting them into harmless water vapor, nitrogen, and CO2. The proprietary nano-technology wash-coat maximizes surface area, achieving OEM-level emissions control while flowing like a 200 CPSI race cat.
Built for Modern Porsche GT3 Platforms
The Gen2 core meets the tighter post-2017 emissions thresholds found in 991.2 and 992 GT3 models—perfect for enthusiasts who track their cars yet still need street legality outside California.
Upgrade and Drive with Confidence
Skip the compromises of a cat delete. Give your 911 GT3 the free-flowing, emissions-compliant exhaust it deserves—backed by Ace Race Parts’ expert support and fast shipping from our Olympia, WA warehouse.
Shop G-Sport High-Flow Catalytic Converters
*Always verify local regulations before installation. Not CARB-legal.
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