SKU: 38356207353

Fabspeed 991.2 GT3/GT3 RS Side Muffler Bypass Pipes (17+) (FS.POR.9912GT3.SMB)

Sale price$616.93 Regular price$685.48
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Ships within 48 hours · Estimated delivery Jul 22 - Jul 27

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Description

Fabspeed 991.2 GT3/GT3 RS Side Muffler Bypass Pipes (17+) (FS.POR.9912GT3.SMB)Optimized design that replaces the heavy and restrictive factory GT3 side mufflers for improved exhaust flow, increased dynamic sports car sound and huge significant weight savings. Utilizing super premium Helical U. K. Aerospace grade valves along with the addition of O2 bungs, Fabspeed's Side Muffler Bypass Pipesprovide the ultimate street and track solution for the 991. 2 GT3 GT3 RS. Prefect upgrade for any Street Driven GT3 touring, GT3RS, Gt3 PDK

Optimized design that replaces the heavy and restrictive factory GT3 side mufflers for improved exhaust flow, increased dynamic sports car sound and huge significant weight savings.

Utilizing super premium Helical U.K. Aerospace grade valves along with the addition of O2 bungs, Fabspeed's Side Muffler Bypass Pipesprovide the ultimate street and track solution for the 991.2 GT3 / GT3 RS. Prefect upgrade for any Street Driven GT3 touring, GT3RS, Gt3 PDK cars. Factory Sport Button PSE is 100% retained with Fabspeed GT3 side muffler bypass pipes with exhaust valves.

FEATURES:

  • Fits all Porsche 991.2 GT3 / GT3 RSvehicles worldwide
  • Highest quality OEM Porsche Ag. Helical Limited United Kingdom exhaust valves are used for bullet-proof reliability.
  • Includes O2 bungs and plugs at no extra charge.
  • Saves 41 lbs 18.6 kg from the rear of the vehicle
  • CAT-BACK Emissions legal. Bolts onto OEM Porsche catalytic converters
  • Replicates aggressive CUP car sound for the street.
  • 14-16ga T304 Stainless Steel construction
  • Retains Sport Button PSE functionality.
  • Simple bolt-on installation- remove rear left and Right side mufflers and install these Works of Art..
  • All Fabspeed performance products are backed by the Fabspeed Lifetime Warranty

HELICAL VALVES:

We chose to use Helical Valves on our 991.2 GT3 / GT3 RS track exhaust systems for their unprecedented quality - which have been proven by many OEM manufacturers such as McLaren, Ferrari, Lamborghini, and many more. Helical valves are an integral part of our Side Muffler Bypass pipes, opening and closing with precision to control the gas flow and optimizing engine back-pressure for improved performance. Helical's extensive experience in high-volume OEM automotive applications has led to standard features such as an extremely durable pneumatic actuator, precision flat sealing faces inside the valve, stiffening ribs and Ultra high temperature high-temperature bearings at both ends of the butterfly spindle. Helical is an Aerospace Company that also makes exhaust components. Fabspeed Motorsport USA is the USAs exclusive importer buyer.

O2 BUNGS:

We relocated the O2 bungs from the collector of the headers to the Side Muffler Bypass Pipes in order to maintain factory-like functionality with our Long Tube Competition Race Headers - allowing them to read all cylinders while maximizing the performance of the collector.This design will replace our existing SMBP's allowing you to upgrade to our Long Tube Race Header design at any time in the future. Extra oxygen sensor ports also allow Data Acquisition at any time. Another value added feature only from Fabspeed.

ClickHere For Install Instructions forPorsche Homelink Connection For Valvetronic Exhaust Control

Note: only Fabspeed Motorsport USA uses Helical Limited England exhaust valves on all systems. Porsche uses Helical exhaust valves on their GT3 mufflers because the valves are bullet-proof silica carbide. FYI- Ferrari, Lamborghini, McLaren, Aston Martin all demand and use Helical Exhaust Valves UK. for their sports cars and hypercars because only Helical doesn't melt, crack, break, flutter or rattle.

 

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 38356207353

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Verified Purchase
Amazon Customer
Chelsea, US
★★★★★ 5
Gracias
Color: Nude
Gracias es bella
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Reviewed in the United States on May 27, 2026
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★★★★★ 5
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Color: Black, Color: Black
Summary This is one of those pieces you grab when you want your outfit to look finished. It definitely delivers on style—just don’t expect it to carry more than the basics. Design & Look This is the main win. The structured shape and clasp detail give it that polished, evening-ready feel. It looks more elevated than a typical soft clutch and works well for dressier outfits. Size & Storage On the smaller side, which is expected for this style. It fits the essentials (phone, cards, lipstick), but that’s about it. If you’re someone who carries everything “just in case,” this won’t be your everyday bag. Build & Structure Holds its shape really well, which keeps it looking clean and put together. Doesn’t collapse or lose form like softer bags. Ease of Use Opening and closing the clasp is simple once you get used to it. Not difficult, just slightly more intentional than a zipper or snap. Comfort & Carry Typical clutch experience—you’re either holding it or using a small strap if included. Not hands-free unless it comes with a chain. Durability Feels solid for occasional use. This isn’t a toss-it-around bag, but for events and outings, it holds up fine. Value for Price Good value if you’re buying it as a style piece. Less about function, more about completing a look. Final Take A great finishing accessory that looks polished and put together. Just go in knowing it’s built for style and essentials—not for carrying your whole life.
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Reviewed in the United States on April 23, 2026
T
The Jazzy Edition
Los Angeles, US
★★★★★ 5
Elegant, Chic & Perfect for Special Occasions
Color: Nude
I absolutely love this clutch purse! The design is sleek, modern, and classy, making it the perfect accessory for weddings, parties, date nights, formal events, or vacations. The neutral color makes it super versatile and easy to pair with different outfits without clashing. Even though it has a compact look, it still holds the essentials like a phone, cards, keys, lipstick, and small personal items comfortably. The hard-shell design gives it a more luxurious appearance while also helping it keep its shape nicely. I also appreciate how lightweight and comfortable it is to carry. Overall, this clutch is stylish, elegant, and a beautiful finishing touch for dressy outfits!
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Reviewed in the United States on May 6, 2026
S
Sea Lover
Belleville, US
★★★★★ 5
Should serve you well for years.
Color: Silver, Color: Silver
This classy evening bag by CHUNLI is large enough to hold all you will need for an evening out. It will hold your keys, driver's license, money, small brush or comb, lipstick, and of course your cell phone. The clasp on top is a little work of art and yet it still does a great job of holding the bag shut. The silver chain (not copper colored as shown in my photo) is strong and attractive and is easy to attach and remove. It makes the bag hands-free if you choose not to carry it as a clutch. Unlike some evening bags, this is a solid formed shape, and will not warp as a soft bag could do. This will enhance your dressy outfit.
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Reviewed in the United States on April 30, 2026
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Amber
Phoenix, US
★★★★★ 3
Cute but Too Hard & Noisy
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