John@Fabspeed

Well folks, the day is here! We have wrapped up development on our new Valvetronic Exhaust System for the GT4 (and 981 Boxster Spyder) and the results are simply sublime. As a thank you to all of our friends and supporters here on the forums, we're offering a ONE DAY ONLY exclusive pre-release opportunity!

Now... let's get to the good stuff! Fabspeed's new GT4 Valvetronic Exhaust System is the ultimate catback setup for the ultimate streetable track car. Injecting an additional 17 whp and almost 30 ft/lbs of torque () at 3600 RPM, this exhaust system completely transforms the powerband of these cars. We could go on, but the dyno graphs speak for themselves.

The two graphs below show the additional power that the Valvetronic Exhaust System provides on top of our Race Headers and Sport Headers. (Please note that you DO NOT need upgraded headers to experience the incredible gains from this system. The gains seen in these graphs are consistent with what you could expect with the OEM headers, although the overall horsepower figures would not be as great.)

user1029

I like

Can you guys make one without the valves? I want LOUD NOISES all the time

thigos

Sounds good in the teaser!

But would really like to see the a dyno with the factory headers.

Does the car in the video have the exhaust and headers?

John@Fabspeed

Don't we all! The beauty of the valves is that you have full control at the push of a button. If you're like me, you get in the car and push the exhaust button at the same time that you're starting the car. The valves are nice though because they allow you get back into your neighborhood after your midnight joyrides without having to explain yourself at the next HOA meeting.

PS: I LOVE your avatar. Well-played, sir!

We did not have the opportunity to perform a dyno test with the OEM headers, but we're hoping to have that done on the next one that comes in. The gains from the exhaust itself will be very similar, though. You can see on the graph that the exhaust has a similar effect regardless on both the catted and catless headers.

The car in the video is equipped with the Valvetronic Exhaust and Sport Headers.


That said, if you've been waiting to jump on a set of Fabspeed headers for your GT4 or new Boxster Spyder, now is the time to act. Our Halloween promotion is running for another 36 hours, so you can save 10% off your headers in addition to the new Valvetronic Exhaust.

Order today and you can save over $700 when you make your GT4 the most exciting, best-sounding car on the road!

PM me or call me today. I promise you'll be glad you did!

John@Fabspeed

FYI for all of you weight-conscious enthusiasts and track junkies: The Valvetronic Exhaust System shaves 7lbs off of the car compared to the OEM exhaust!

John@Fabspeed

CAlexio

will be in touch once delivery happens.. I'll have the loudest Spyder on the road LOL.

hopefully you come up with some header+exhaust deals ;-D..

looks like really beautiful work, and the power gain, especially the midrange torque gains are very impressive... I didn't know that much could be gained from a NA engine!!!!
shows how much is locked up in this one!

John@Fabspeed

Sounds good, and so will your car! We appreciate your compliments! We're really proud that we smoothed out the midrange torque dip, it's a difference you can feel for sure. Porsche is holding your power back, we're here to unleash it!

arsxs04

Can you guys do another video with this exhaust and the race header? Looking at the dyno, the results between the race and street header are almost identical. Can't decide which way I'd go.

arsxs04

Also what is the weight savings of the sport header compared to stock? Is it 10lbs as the race header?

ExMB

OK, now I'm .
With the race headers it shows 18.77 whp & 27.44 ft/lbs gain and with the sport headers it shows 12.29 whp & 17.96 ft/lbs gain, both at 3600 rpm.
How can this be advertised, by implication, as 17 whp & almost 30 ft/lbs gain at 3600 rpm with just the exhaust and the rest being factory parts? I think a dyno with factory parts and the exhaust would help to clear this up.

s2ktaxi

agree. I don't think the exhaust alone will add as much to a stock setup if the headers/cats are a limiting factor - as the data so far seems to imply.

That said, it seems that the sport headers need the FAB exhaust in order to overcome loss of hp or torque at certain rev ranges of just going with the sport headers

steve0827

Are there any clips with the valvetronic exhaust and stock headers?

Thanks!

Petevb

Again ending the dynos 900 rpm before fuel cut. One is temped to infer the curves past that point do not look flattering...

CAlexio

apology if this has already been covered, but are these graphs showing the hardware upgrades coupled with some kind of ecu upgrade like cobb accessport, or are these just with headers and exhaust?

noticing on another thread that there are significant gains with just using the cobb accessport, without even adding the fabspeed.. any thoughts to trying the two together to see what happens? i'm actually shocked at the power gains of the cobb by itself on an NA engine. what else is hiding in these motors?