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FABSPEED SIDE MUFFLER BYPASS PIPES FOR 991.1 PORSCHE 911 GT3 & GT3 RS

Name: FABSPEED SIDE MUFFLER BYPASS PIPES FOR 991.1 PORSCHE 911 GT3 &amp; GT3 RS
SKU: 24877
Availability: InStock

SKU: N/A

Fabspeed

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OEM-quality fitment for precise installation.

Sourced from certified, top-tier automotive brands.

Fabspeed Side Muffler Bypass Pipes for 991.1 Porsche 911 GT3 & GT3 RS

The Fabspeed Side Muffler Bypass Pipes for the 991.1 Porsche 911 GT3 & GT3 RS are engineered to enhance both performance and sound. Featuring the highest quality Helical valves, these pipes save 34lbs from the rear of the vehicle while replicating the aggressive CUP car sound for a thrilling street experience. Constructed from durable 14-16 gauge T304 stainless steel, they ensure optimal flow and longevity. With a simple bolt-on installation process, upgrading your GT3 or GT3 RS has never been easier, delivering improved performance and an unmistakable exhaust note.

Helical Valves

Fabspeed chose to use Helical Valves in their 991 GT3 / GT3 RS track exhaust systems for their exceptional quality, which has been proven by numerous OEM manufacturers such as McLaren, Ferrari, Lamborghini, and others. These valves are a key component of Fabspeed’s Side Muffler Bypass pipes, opening and closing with precision to control gas flow and optimize engine back-pressure for enhanced performance. Helical’s extensive experience in high-volume OEM automotive applications has led to features such as a highly durable pneumatic actuator, precision flat sealing faces inside the valve, stiffening ribs, and high-temperature bearings at both ends of the butterfly spindle.

02 Bungs

Fabspeed relocated the O2 bungs from the collector of the headers to the Side Muffler Bypass Pipes to maintain factory-like functionality with their Long Tube Competition Headers, ensuring that all cylinders are read while optimizing the performance of the collector. This design replaces the existing SMBPs, allowing for a seamless upgrade to the Long Tube Race Header design at any time in the future.

Features

Highest quality Helical valves
Saves 34lbs from the rear of the vehicle
Replicates aggressive CUP car sound for the street
14-16ga T304 stainless steel construction
Simple bolt-on installation
Includes O2 bungs for factory like functionality
All Fabspeed performance products are backed by the Fabspeed lifetime warranty

Applications

Porsche 911 GT3: 991.1 (2014-2016) [4.0L F6]
Porsche 911 GT3 RS: 991.1 (2015-2016) [4.0L F6]

Notes

All Fabspeed products are expected to ship within one week of order, though timelines are often much quicker
To retain PSE functionality please select the valved option upon checkout
Installation instructions for Porsche homelink connection

About Fabspeed

Fabspeed Motorsport is situated in Fort Washington, Pennsylvania, within the United States of America. Their extensive 26,000 sqft. facility serves as a hub for various car clubs, including Porsche Club of America, Ferrari, McLaren, Lamborghini, and more. The company is renowned for its comprehensive approach to product development. They handle the entire process, from design and engineering to dyno testing, street trials, and racing assessments, ensuring the quality and performance of every item. Fabspeed also collaborates closely with race engine builders and tuners hailing from Italy, Germany, and the United States, resulting in the creation of the Ultimate Performance parts. To cater to their passionate global audience, Fabspeed meticulously crafts systems using aerospace-grade austenitic stainless steel, titanium, and carbon fiber materials, setting a standard for excellence in the industry.

valve-configuration	Valved, Non-Valved

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We want you to feel confident before making your purchase. Here are a few important details to help you better understand this product and how it fits into your space.

Please review the product dimensions carefully to ensure the right fit for your space
Color may vary slightly due to lighting and screen settings
Materials and finishes are selected for both durability and visual appeal
Some items may require simple assembly upon delivery
Perfect for both everyday use and long-term comfort

If you have any questions about this product, feel free to reach out to our support team. We're here to help you make the right choice.

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Product Size Guide

Please refer to the general size reference below to better understand how this product may fit into your space. Dimensions may vary slightly depending on the design and materials.

Category	Small	Medium	Large
Decor & Accessories	Up to 10″	10″ – 20″	20″+
Tables	Up to 30″	30″ – 60″	60″+
Seating	1 Seater	2–3 Seater	4+ Seater
Storage Units	Compact	Standard	Large Capacity
Lighting	Small Fixture	Standard Fixture	Large Fixture

Note: For exact product dimensions, please refer to the specifications section above. This guide is intended as a general reference only.

FABSPEED SIDE MUFFLER BYPASS PIPES FOR 991.1 PORSCHE 911 GT3 & GT3 RS

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FABSPEED SIDE MUFFLER BYPASS PIPES FOR 991.1 PORSCHE 911 GT3 & GT3 RS