Porsche 991.1/991.2 GT3 Free Flow Headers - Valvetronic Exhausts

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Porsche 991.1 / 991.2 GT3 Performance Headers

T304 Stainless Steel | Precision 3D-Engineered Fitment

Let the GT3 Sing as Intended

The Porsche 991 GT3 is defined by one thing above all else: its engine. A naturally aspirated, high-revving flat-six built to be driven hard. Yet even with its motorsport DNA, the factory exhaust system restrains both sound and response. Our Performance Headers are engineered to remove those limitations—unlocking the raw, race-bred character the GT3 was designed to deliver.

Using advanced 3D modeling technology, each header set is precision-engineered to replace the factory units with perfect OEM-level fitment. The result is sharper throttle response, improved exhaust flow, and a spine-tingling exhaust note that intensifies all the way to the 9,000 RPM redline.

Why It Works

Optimized Equal-Length Design
Carefully tuned primary lengths improve exhaust scavenging, increasing mid-range torque while sharpening throttle response at high RPM.

Precision OEM Fitment
3D-scanned and engineered directly from factory components to ensure a true bolt-on installation—no cutting, no modification.

Authentic GT3 Sound
Releases a more aggressive, motorsport-inspired flat-six scream without unwanted rasp, preserving refinement during normal driving.

Construction & Quality

• Material: Premium brushed T304 stainless steel for exceptional heat resistance and longevity

• Fabrication: Hand-built using precision TIG welding for maximum strength under extreme conditions

• Finish: Brushed stainless steel for a clean, purposeful motorsport aesthetic

Designed to withstand sustained high-RPM use on both road and track.

Vehicle Fitment

• Porsche 911 GT3 (991.1)

• Porsche 911 GT3 (991.2)

Installation Notes

• Direct bolt-on installation

• No cutting or welding required

• Compatible with factory and most aftermarket exhaust systems

What’s Included

• Pair of T304 stainless steel performance headers

• All necessary installation hardware

Technical Specifications

• Material: Brushed T304 stainless steel

• Manufacturing: Mandrel-bent tubing with precision TIG welds

• Design: Equal-length primaries for optimal power delivery and exhaust tone