High-Flow Race Headers – Porsche 991.1 / 991.2 GT3 & GT3RS (T304 Stainless Steel)

Unleash the full performance and sound potential of your Porsche 991 GT3 or GT3 RS with the Cen-Cal Motorsport High-Flow Race Headers, engineered for maximum flow, throttle response, and pure motorsport tone. Designed for the high-revving 9,000 RPM flat-six, these headers transform both the character and capability of your GT3—enhancing exhaust velocity, mid-range torque, and top-end power.

Constructed from premium T304 stainless steel, each set is built to withstand extreme track temperatures and deliver long-lasting durability. Precision-engineered mandrel bends and TIG welds ensure perfect flow consistency and a flawless fit—backed by the same race-ready quality standards used in our F1 exhaust systems.

Product Features

• T304 Stainless Steel Construction: Corrosion-resistant stainless steel designed for heat endurance and long-term durability
• Maximized Exhaust Flow: Reduces backpressure, increases horsepower, and sharpens throttle response across the RPM range
• Mandrel-Bent Tubing: Smooth, unrestricted flow with consistent diameter for optimal gas velocity
• Precision TIG Welds: Show-quality welds ensure strength, durability, and premium finish
• 100% OEM-Compatible Fitment: Direct bolt-on installation for factory or aftermarket exhaust systems—no cutting or permanent modifications required

Configuration Options

• Free-Flow Catless Race Headers: Loudest, most aggressive tone and maximum performance
• High-Flow Catted Race Headers: Strong flow while providing a more refined, street-friendly sound

Fitment

• 2014–2019 Porsche 991.1 / 991.2 GT3
• 2016–2019 Porsche 991.1 / 991.2 GT3RS

Benefits

• Noticeable horsepower and torque increase throughout the rev range
• Sharper throttle response and reduced backpressure
• Aggressive, high-frequency exhaust note true to Porsche motorsport heritage
• Precision-built from premium stainless steel for lasting performance
• Fully reversible installation compatible with stock or aftermarket cat-backs

Lead Time & Availability

This product is sometimes in stock at our Oceanside, CA location, but lead times can vary based on demand. All headers are usually made to order, typically requiring 5–15 business days for production, with an additional 10 business days for shipping.

Please email support@cencalmotorsport.com to check current availability before ordering.

FAQs

Do I need a tune with these headers?

A tune is recommended to optimize performance and prevent check-engine lights when removing or modifying catalytic components.

Are these street-legal?

These headers are for off-road and track use only and may not comply with emissions regulations in all areas.

Do they work with the factory exhaust system?

Yes, they integrate seamlessly with both OEM and aftermarket cat-back systems.

Are these a full replacement?

Yes, they replace the factory headers entirely with a high-performance, race-grade design.

⚠️ THIS PRODUCT IS FOR OFFROAD USE ONLY