Porsche 981 Cayman GT4 Spyder Valvetronic Exhaust System

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  • Adjustable slip-on outlets for the Fabspeed GT4 Valvetronic Exhaust System which re-direct and control the exhaust volume by over 5dB; perfect for decibel-limited motorsport venues!

Fabspeed's Valvetronic Exhaust System is the ultimate catback setup for the ultimate streetable GT4 dual use street/track car. New anti-resonance technology makes for an even more enjoyable experience. This is the Finest system that money can buy. Seriously>                                         

SOUND: We're proud to offer a premium exhaust solution for the Porsche Cayman GT4. Our Valvetronic Exhaust offers two distinct tones depending on valve position: mild and wild. It was important to retain civility around town with valves closed, mission accomplished. You'll be able to enter your neighborhood after a midnight joyride without having to explain yourself at the next HOA meeting. Open the valves, and you'll be treated to a glorious roar befitting of the GT4. Burbles and backfires erupt in abundance, and downshifts summon a bark that will make all eyes and ears around focus on you. We're not exaggerating. This system will put an ear-to-ear smile on the most miserly of faces.

POWER: When combined with Fabspeed's Race Headers, our Valvetronic Exhaust System allows you to push 375 whp out of your GT4! Even with Sport Headers coming in at 371 whp, the gains in power are as impressive as the sound. The Fabspeed exhaust suite completely eliminates the torque dip in the 3500 RPM range and offers power gains all the way through redline. The increase in low end power will make a great difference in street driveability with the long gearing of the GT4. 

FINISH: Full #2 polished T304L stainless steel, beautifully welded together and finished off with premium carbon fiber shrouded tips which fit the rear bumper of the GT4 like a finely tailored suit.


  • Fits all Porsche 981 Cayman GT4 / 981 Boxster Spyder vehicles (2015-2016)

  • Choose between real matte Carbon Fiber tips or Single Wall Tips that are made in house for a racecar look

  • CAT-BACK emissions legal. Bolts onto OEM Porsche catalytic converters. 

  • Weighs 7lbs less than the factory rear muffler system.

  • CNC Mandrel bent 2.5" 63.5 precision inlet tubes to a valvetronic rear system with a 2.5" 63.5mm ultra high flow rear X pipe. 

  • Independently DYNO tested by multiple Porsche engine builders and Race Teams to make more power than any other systems with world class symphonic sports car sound.

  • Fabspeed made more power: +25 HP versus copycat polished and sandblasted systems, +10HP over GT3 titanium center muffler based systems, and +20 over Italian systems. Some of these systems mentioned losts power versus the stock GT4 PSE OEM POrsche system. Fabspeed made +14HP the Porsche system. You 100% can not go wrong with Fabspeed. 

  • Innovation not Imitation. 

  • Helical Aerospace United Kingdom exhaust valves- same ultra never fail valves used on Porsche GT3, GT3RS. Silica carbide quality. 

  • 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


Click Here For Install Instructions for Porsche Homelink Connection For Valvetronic Exhaust Control

NOTE: For vehicles not equipped with a Porsche Sport Exhaust (PSE) / valves from the factory, a Fabspeed Valve Controller Kit is necessary to control the operation of the valves. Please choose the appropriate kit before ordering. 


The Porsche Sport Exhaust – better known as PSE – was a factory option available on many late model Porsches. You can quickly and easily determine if your vehicle is equipped with PSE by taking a look at your center console. If your console has a button on it with an “exhaust tip” icon (see photo), then your vehicle is equipped with PSE, and you should select the PSE option when adding this product to your cart. If you do not see this button, the your vehicle does not have PSE and you should select the standard exhaust option when checking out.

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3 Reviews

  • 5
    excellent sound

    Posted by Andrew Wensel on 17th Apr 2017

    The GT4 sound is nice and aggressive with this exhaust. This makes the car sound like it actually feels beneath your seat. You'll get some exhaust drone at lower rpm and cracking the windows open a bit will help to make this tolerable at cruising speed so you don't end up with ringing ears. Overall I love the sound of this exhaust. The construction and carbon fiber tips are really nicely done too.

  • 4
    Thank you

    Posted by Horacio S on 22nd Feb 2017

    I could never let go of my 993 Carrera because I love the air cooled sound, very unique. I have to say the GT4 has it's own distinct tone that has my heart. The valvetronic exhaust amplified everything I love about the engine note and has turned it up to 11. This is paired with my Fabspeed Sport Headers and the volume is now on the high side which may not be for everyone, but where my 993 is the right level of rumble for leisurely driving the GT4 is a vivid reminder of Porsches racing history every time I give it gas now. Bravo!

  • 5
    God of Thunder!

    Posted by David on 28th Dec 2015

    I recently installed the Fabspeed Race Headers and Valvetronic Exhaust System on my Porsche GT4...or should I say, I recently came face to face with The God of Thunder. For me, the sound of a car is nearly paramount in the car experience. The GT4 with this Fabspeed setup is better than anything I have ever heard. Even beats my favorites of a screaming Ferrari V12, the Lexus LFA, the Porsche Carrera GT, and the C7 LeMans Corvette. I would take this over any of those...and I don't say that lightly. The setup I chose is not for the faint of heart. 7500 rpms with open windows in a tunnel would make Zeus himself cower. Kudos to Fabspeed and Porsche for attaining automotive perfection.

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