SKU: 89202612624

Fabspeed 991 GT3 / GT3 RS Rennsport Muffler (14-16) (FS.POR.991GT3.RSMTD)

Sale price$2176.62 Regular price$2418.47
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Ships within 48 hours · Estimated delivery Aug 17 - Aug 22

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Description

Fabspeed 991 GT3 / GT3 RS Rennsport Muffler (14-16) (FS.POR.991GT3.RSMTD)The ULTIMATE OEM style high performance replacement muffler for your GT3! As many GT3 owners know, the OEM mufflers are prone to cracking, breaking and blowing out, particularly the titanium mufflers on GT3RS cars. We wanted to design a muffler replacement that not only fixed that issue but also improved on the OEM design. Using our 25+ years of air and water cooled experience, we took the valve open tubing to 2. 75in 70mm which is the optimal

The ULTIMATE OEM style high performance replacement muffler for your GT3!                                                                                           

As many GT3 owners know, the OEM mufflers are prone to cracking, breaking and blowing out, particularly the titanium mufflers on GT3RS cars. We wanted to design a muffler replacement that not only fixed that issue but also improved on the OEM design. Using our 25+ years of air and water-cooled experience, we took the valve open tubing to 2.75in / 70mm which is the optimal diameter for GT3 engines to have low restriction but maintain high velocity and high GT3 pitch for the signature GT3 CUP car sound. Then, we implemented our signature investment cast X-Pipe for optimal exhaust scavenging. The X merges the two cylinder banks without creating any restriction in exhaust flow. To maintain the factory muffler’s exhaust note and lack of drone, we mimicked Porsche’s 7 chamber design. This makes for a completely drone free muffler, even when running catless race headers! Pair this with our Side Muffler Muffler Bypass Pipes for the ultimate emissions compliant GT3 exhaust. This muffler is guaranteed to NEVER BREAK or fail.

SOUND:

This muffler will have a very similar tone to the OEM muffler, however, it will be a bit louder with PSE turned on. It will also sound a bit smoother and higher pitched thanks to our signature X-pipe.

POWER:

On our 991.1 GT3RS test car, paired with our Side Muffler Muffler Bypass Pipes, the Rennsport Muffler picked up an impressive 27 ft/lbs of TQ down low at 3,200 RPM. From 2,900 RPM all the way to 5,700 RPM it picks up 10 WHP or more, and peak WHP is up from 446 to 454! That’s a gain of 8 WHP or 9 HP at the crank.

FEATURES:

  • Fits all Porsche 991 GT3 / GT3 RS vehicles 2014-2016 worldwide
  • Constructed from CNC cut T304L stainless steel
  • Designed from 3D scans of the OEM muffler so we can achieve perfect bolt-on fitment
  • Will not break or crack like OEM GT3 mufflers do
  • Incorporates our signature cast X-pipe for superior flow and exhaust scavenging
  • Paired with our Side Muffler Bypass Pipes this muffler adds +27 ft/lbs of TQ and +16 WHP or +18 HP at the crank!
  • 3 different tip options available
  • Completely retains PSE valved exhaust functionality
  • No Check Engine Light guaranteed
  • This cat-back system is emissions legal in all 50 states and the rest of the world
  • Built in house at Fabspeed Motorsport USA in Fort Washington, PA
  • Simple bolt-on installation, no cutting or welding required
  • All Fabspeed performance products are backed by the Fabspeed Lifetime Warranty
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: 89202612624

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4.3 ★★★★★
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Fred Haseman
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★★★★★ 5
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Style: Classic + 2pk Ball, Size: 26in
This has provided hours of entertainment for our dog. The Length was perfect and saves a lot wear on your back from not having to bend over as much.
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Reviewed in the United States on April 22, 2026
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Rachel
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★★★★★ 5
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Style: Classic + 2pk Ball, Size: 26in
Probably one of the best purchases I have made! The balls are far superior to any tennis ball. My dog likes to chew or bite down on the balls once she catches them and tennis balls ball apart. As to the actual thrower - the extra length on this one has helped me, I had back surgery and am not able to bend over I can reach the ball without too much difficulty. So to sum it up - best dog throwing toy I have purchase!
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Reviewed in the United States on May 9, 2026
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John Hines
Dallas, US
★★★★★ 5
Great value and amazing quality!
Great quality, as the bags are not as thin as the other brands, so they are an amazing value and choice.
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Reviewed in the United States on March 24, 2026
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Linda Hamilton
Birmingham, US
★★★★★ 5
Small balls for all of my dogs
I have 5 dogs of various sizes, and I have found that they all love the smallest tennis balls. The biggest won't touch a 3" tennis ball. I also have 2" balls, but everyone's favorite is the 1.5" ball. Now I have 40 of them to last a while!. This package comes with more colors than I've ever had, and they're all very visible. The purple is the least visible, but you can still see it in the grass. We have a large field and constantly throw the balls out. The dogs get plenty of exercise running and jumping after them. The dogs love the squeakers. The big dog (only 35 lb) can put the whole ball in her mouth, but she is not the type to try to swallow it, so I'm not worried. (I know there are some dogs out there who would swallow anything.) She just wants to bite down on it and hear it squeak. It's so much fun watching my dogs and their squeaky balls. The set came with a mesh bag for storage, too.
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Reviewed in the United States on April 28, 2026
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lauren
Louisville, US
★★★★★ 5
My dog is pleased!
Size: 10 Pacck, Color: Multicolor
My 7 lb cavapoo loves these!! They are the perfect size and a good deal.
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Reviewed in the United States on March 11, 2026

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