SKU: 38561465406

Fabspeed 981 Cayman GT4/Spyder Valvetronic GT3 Muffler Conversion Kit (FS.POR.981GT4.GT3CKBR)

$1246.02 $1384.47
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Ships within 48 hours · Estimated delivery Aug 29 - Sep 3

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Description

Fabspeed 981 Cayman GT4/Spyder Valvetronic GT3 Muffler Conversion Kit (FS.POR.981GT4.GT3CKBR)Porsche Boxster Cayman owners have requested a conversion kit that allows the installation of a Porsche OEM 991 GT3 center muffler onto their cars. Fabspeed Motorsport listened and designed in CAD and built inhouse a lightweight installation kit that allows any 6 speed Porsche 981 GT4 or Spyder owner to install an OEM GT3 center muffler (A PDK version will also be available once we are able to test fitment). This kit also allows the installation of a

Porsche Boxster Cayman owners have requested a conversion kit that allows the installation of a Porsche OEM 991 GT3 center muffler onto their cars. Fabspeed Motorsport listened and designed in CAD and built inhouse a lightweight installation kit that allows any 6 speed Porsche 981 GT4 or Spyder owner to install an OEM GT3 center muffler (A PDK version will also be available once we are able to test fitment). This kit also allows the installation of a Fabspeed 991 GT3 Center Muffler Bypass Pipe or 991 GT3 Center Mini Maxflo Performance Exhaust onto your 981 GT4/Spyder.

The system consists of 2.5" 63.5mm CNC mandrel bent one piece Left and Right side over axle pipes and clamps. Then a set of valved side muffler inlet Y-pipes that retain the factory PSE valved exhaust functionality. The valves are OEM Porsche GT3 HELICAL vacuum-actuated exhaust valves that are imported from the U.K. We use our FLOW Waterjet to cut a CAD designed, lightweight, stainless steel mounting bracket to hold the muffler; hardware for installation is included. This and the Factory Porsche muffler band straps hold everything in place. For tips, you can use the factory 991 GT3 tips or you can order our custom exhaust tip mount with any choice of our signature tips.

SOUND:

Enjoy the characteristic sound of a factory Porsche engineered exhaust but with a nice increase in volume! With PSE off (valves closed), the exhaust is still tame and livable in the cabin. However, with PSE on (valves open) hear that flat 6 howl up to redline! The larger over axle pipes that are included also contribute to the overall louder tone.

POWER:

The 991 GT3 muffler was designed by Porsche to support 475 HP, because of this it flows a lot better than the 981 GT4 muffler that was only designed for 385 HP. We expect this increase in flow, helped by our larger over axle pipes and muffler inlets, to give a nice HP increase. 

FEATURES:

  • Fits all 6 speed manual Porsche 981 Cayman GT4 / 981 Boxster Spyder vehicles (2015-2016). A PDK version will also be available once we are able to test fitment
  • Choose between your choice of Premium Fabspeed Exhaust Tips or use OEM 991 GT3 Tips.
  • CNC Mandrel bent 2.5" 63.5 precision over axle pipes to valvetronic inlet pipes
  • Helical Aerospace United Kingdom exhaust valves- same OEM quality valves used on Porsche GT3, GT3RS. Made with Silica carbide.
  • Constructed from 14-16ga T304L stainless steel tubing for maximum power and durability
  • Direct bolt-on installation; no cutting or welding required
  • All Fabspeed performance products are backed by the Fabspeed Lifetime Warranty

NOTE:

  • OEM GT3 center muffler is NOT included
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
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  • Delivery to the USA:
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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: 38561465406

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4.3 ★★★★★
Based on 6 reviews
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K
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Ken Paulson
Fort Morgan, US
★★★★★ 2
Very poor print quality
Format: Paperback
The contrast is so low on the images that in many cases they are nearly illegible. There are many sentences which are similar to "by clicking on the [illegible text/icon] button, you can...". Not helpful. "If you look at Figure 2-14 you can see the output...". No, no I can't. Maybe the eBook version is better, but the print version is very poor quality.
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Reviewed in the United States on January 23, 2022
M
Verified Purchase
Mary Georgescu
Alexandria, US
★★★★★ 5
A Must-Read for Anyone Building (or Rebuilding) a Community—from the Ground Up or Within a Studio
Format: Paperback
Mastering Community Management by Victoria Tran is easily one of the most approachable, grounded, and genuinely helpful books I’ve read on the subject. It’s not weighed down by corporate jargon or vague motivational fluff. Instead, it reads like a knowledgeable friend sitting beside you, walking you through what community actually is and what it isn’t. As a small indie developer trying to revitalize my own brand and reconnect with my community after a long absence, this book hit at exactly the right time. It gave me not only strategies, but the right questions to ask myself about the kind of experience I want to create. Too many resources focus on surface-level tactics—Victoria goes deeper. She invites you to reflect on your values, your voice, and your long-term goals, then gives you tools to act on them. One of the strongest aspects of this book is how clearly it distinguishes community management from marketing, social media, PR, and other often-blurred roles. If you’ve ever struggled to explain the value of community work to stakeholders or collaborators, this book gives you the language, examples, and frameworks to make your case with clarity and confidence. It’s also deeply aware of the wide range of contexts in which community work happens. Tran never assumes you're working with a massive team or unlimited resources. Whether you're part of a AAA studio, a two-person indie dev team, a hobbyist group, or something in between, the book respects those differences and offers flexible, practical guidance that can be scaled or remixed to fit your needs. The book is packed with real-world examples and thoughtful exercises that walk you through both practical strategies and big-picture thinking. You’re not just handed advice—you’re invited to work through your own approach using templates, prompts, and reflection activities that are grounded in real experience. Every chapter is dense with insights that are critical for new developers and also thought-provoking for those who’ve been in the industry a while. And while the book is focused on video game communities, its frameworks feel highly adaptable. As someone also working in the tabletop space, I found that many of the ideas translated beautifully—especially in a field where so much success is driven by small, tight-knit communities and word-of-mouth engagement. For those of us wearing multiple hats—dev, marketer, moderator, cheerleader—this is the kind of resource you’ll return to again and again. Whether you're just starting out or trying to rebuild trust and engagement, Mastering Community Management provides clarity and care in equal measure. It’s clear, it’s kind, and it’s deeply useful. Buy it for yourself, your team, and anyone who still thinks community is “just Discord.”
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Reviewed in the United States on July 26, 2025
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Lyndsay Bamberger
New York, US
★★★★★ 5
Wonderful!
Format: Paperback
Great read
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Reviewed in the United States on September 20, 2025
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David Galindo
Lake Worth, US
★★★★★ 5
Required reading for just about anyone!
Format: Paperback
Rare that we get a book that encompasses so much vital information about the games industry that can also be utilized across a number of fields, rarer still that we get to learn from one of the best in a funny, heartfelt and down to earth book that is a steal at any price. You will read this, and come back to this book, for the years to come.
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Reviewed in the United States on August 3, 2025
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Verified Purchase
BookReader
Houston, US
★★★★★ 5
Extremely practical guide to community management!
Format: Paperback, Format: Paperback
Victoria Tran’s Mastering Community Management is the book I wish I had when I was managing massive startup communities as an introvert. It validates the emotional labor behind the role and reframes community management as care, not chaos. Tran’s strategies are practical, but what makes the book powerful is her empathy. She shows that introverts’ strengths from listening deeply, noticing subtle shifts, valuing one‑on‑one connection, are essential to building healthy communities. Her emphasis on kindness and intentionality reminded me that the late nights, careful responses, and invisible scaffolding of trust truly matter. This book is both a guide and a comfort. It proves that introverts can thrive in community management, and it honors the humanity behind the work.
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Reviewed in the United States on November 16, 2025

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