High-Flow Race Headers – Porsche 991.1/991.2 GT3 & GT3RS (T304 Stainless Steel)
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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
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T304 Stainless Steel Construction: Corrosion-resistant stainless steel designed for heat endurance and long-term durability.
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Maximized Exhaust Flow: Reduces backpressure, increases horsepower, and sharpens throttle response across the RPM range.
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Mandrel-Bent Tubing: Smooth, unrestricted flow with consistent diameter for optimal gas velocity.
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Precision TIG Welds: Show-quality welds ensure strength, durability, and premium finish.
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100% OEM-Compatible Fitment: Direct bolt-on installation for factory or aftermarket exhaust systems—no cutting or permanent modifications required.
Configuration Options
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Free-Flow Catless Race Headers: Loudest, most aggressive tone and maximum performance.
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High-Flow Catted Race Headers: Strong flow while providing a more refined, street-friendly sound.
Fitment
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2014–2019 Porsche 991.1 / 991.2 GT3
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2016–2019 Porsche 991.1 / 991.2 GT3RS
Benefits
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Noticeable horsepower and torque increase throughout the rev range
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Sharper throttle response and reduced backpressure
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Aggressive, high-frequency exhaust note true to Porsche motorsport heritage
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Precision-built from premium stainless steel for lasting performance
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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 OFF-ROAD USE ONLY
High-Flow Race Headers – Porsche 991.1/991.2 GT3 & GT3RS (T304 Stainless Steel)
If you have any questions, you are always welcome to contact us. We'll get back to you as soon as possible, within 24 hours on weekdays.
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Shipping Information
Orders take 24–48 hours to process once placed. Made-to-order items begin production after processing, while in-stock items are prepped, packaged, and ship within 3–4 days from our Oceanside, CA location (please allow extra time for packages to arrive during high-volume periods). Some items may be backordered—if so, we’ll email you with status and options. Freight items such as wheels, exhausts, trunks, and hoods require additional handling time and may ship separately.
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Customer Support
Real BMW-savvy humans here. We’re available Mon–Fri, 10am–5pm PT by email and phone/text for install questions, fitment help, or order updates. Send your year/model/trim (VIN if handy) and we’ll point you to the right parts fast.
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FAQ’s
Quick answers to the most common questions: fitment & compatibility, order changes/cancellations, build & lead times, international shipping & duties, and returns/exchanges. Start there for instant clarity—then reach out if you still need a hand.
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Contact Us
Need help choosing parts or tracking an order? Send an email to our support team, support@cencalmotorsport.com
About Us
Cen-Cal Motorsport isn’t just a parts shop—it’s a lifestyle for BMW enthusiasts who crave performance, precision, and style. We’re all about taking your BMW to the next level with premium parts that bring out the beast under the hood while keeping its luxury vibes on point.
Your BMW isn’t just a car—it’s an experience. Whether you're upgrading for speed, handling, or simply flexing on the road, we’ve got the gear to match your passion.
Why settle for stock? Explore our lineup and see how real quality transforms the drive. Got questions? Hit us up anytime—your ride deserves nothing but the best.
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We brought this E92 335i back from the dead — now it’s your chance to take the keys. From the yellow-powdered turbo and short-throw shifter to our full valved catback system, every inch of this build represents what CenCal Motorsport stands for: no halfway builds.
Every purchase of merch or quick entry gets you closer to owning this car. Whether you’re a die-hard BMW enthusiast or just chasing the dream of a true street-built machine — this is your shot.