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SpeedTech X-cellerator Exhaust Stainless Hi-Flow Cats In-Line Mufflers Porsche 996 GT3 1999-2005



Model #996GT3-EXH

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This product is for Racing Competition only and is not legal for use in highway or street vehicles or other non-racing competition off-road vehicles.

Purchasing this product requires you to sign our Vehicle Compliance Waiver here.

Our modular 996 GT3 design enables quick and easy swaps between the various sound and perfor- mance levels. The versatile design is very easy to use and results in extremely quick installation and simple change-overs drom catted to catless RACE and muffled to muffler bypass or any combination.

PERFORMANCE - The SpeedTech 996 GT3 X-cellerator cross-flow system reduces approximately 50 pounds of weight (full system w/ cats) vs. Porsche OEM exhaust. Additional weight savings can be re- alized with use of the use of off road bypass configurations. Whether quicker lap times or straight line speed is your goal, the improved response, additional power and weight savings of this system will help yield quicker track times. The SpeedTech free flowing, straight through muffler design, along with pro- prietary hi-flow catalytic converters will improve the sound and performance of your Porsche GT3. In- creased torque and horsepower, faster track and 1/4 mile times, better everyday performance and the pronounced engine note will insure an enhanced driving experience for all types of uses.

All components are constructed of T304 stainless steel and our muffler are packed with stainless steel wool for years of trouble free performance, even under extreme use conditions. This is a very well built, top of the line exhaust system for the discriminating enthusiast and a perfect fit for the Porsche GT3.

SOUND - The SpeedTech X-cellerator X-flow system emits a fantastic note compared to the factory system supplied with the car - our unique X-Design creates an exotic sound that is truly phenomenal to listen to as you lap your car around the track or enjoy a spirited drive. SpeedTech offers a lifetime warranty of manufacturing defectsfor the original owner. The SpeedTech GT3 X-cellerator system is designed, tested and manufactured in the USA.


  • Stainless steel
  • X-flow design
  • Hi-flow cats
  • In-line mufflers
  • Le Mans tips

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/!\ warningWARNING: Cancer and Reproductive Harm

Vehicle Engine Notes
Porsche 996 C2/C4

Porsche 996 GT3/GT3 RS

Who Is SpeedTech?

Founded in 2007, Speed Technologies (also known as SpeedTech) provides quality exhaust parts and accessories specific to Porsche models. The market-specific manufacturer is widely recognized for its personal one-on-one communication and knowledge, which has been used to produce some of the finest Porsche products in the automotive aftermarket. As the industry expands, however, SpeedTech will look to reach out and diversify its product offerings in the aftermarket with proven parts and quality components. Beginning with a 1972 Porsche 911T, SpeedTech has concentrated its efforts on Porsche and looks forward to the future development and expansion of the brand.

What Does SpeedTech Offer?

SpeedTech’s goal is to provide the best-performing products available, combined with superior quality, low cost, and unparalleled customer service. The team at Speed Technologies understands the ins and outs of everything Porsche-related. As Porsche owners and enthusiasts for more than 30 years, the SpeedTech team has excellent insight as to what constitutes an exceptional exhaust. The result is a comprehensive line of superior performing exhausts for a variety of Porsche models. The brand’s efforts have not been limited to Porsche, however, as SpeedTech has developed numerous performance exhausts for several domestic makes, including Ford, Cadillac, Chevrolet, Chrysler, Pontiac, Dodge, Jeep, Hummer, Plymouth, Oldsmobile, and more!

Why Choose SpeedTech Exhausts?

Years upon years of developing and testing exhaust products have provided SpeedTech with a unique insight as to how to design exhaust systems that both sound and perform exceptionally well. The company spends countless hours assessing and refining the sound attributes of each design to eliminate unwanted noises (i.e. drone) and enhance the best sounds from a vehicle’s motor. Speed Technologies, over the years, has become the leader in providing the daily 700-horsepower-plus daily-driven Porsche 996TT with the proper exhaust and accessories. The result is an expansive series of superior-sounding, high-performance exhausts for a variety of Porsche and other high-end sports cars. Additionally, these systems deliver substantial horsepower and torque gains, along with improved throttle response which is achieved with the free-flowing, unrestrictive straight-through design.

Upgrade to a SpeedTech Exhaust Today

If you want to improve the sound, performance, and appearance of your Porsche or domestic sports car, SpeedTech is the brand you need. SpeedTech exhaust systems boast unsurpassed quality, power gains, and performance with a tantalizing exhaust note. Vivid Racing carries a wide array of SpeedTech products to enhance your driving experience, including catted downpipes, catback exhausts, exhaust tips, catalytic converters, headers, intake manifolds, mufflers, and turbo hoses. If you cannot find what you are looking for above or have fitment questions, please do not hesitate to call our specialized sales team at (480) 966-3040.

Warranty: All SpeedTech products are protected by a lifetime warranty against manufacturing defects or structural failure for the original owner. This excludes catalytic converters which carry a 3 year warranty for the original owner. Our Catalytic converter warranty is for catalytic converter efficiency performance only and does not cover failure or abuse from track, off road or racing events. Any products sold that are manufactured by other companies (such as spark plugs, coils, etc.) offer the warranty from the original manufacturer.

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