Larry Cable

trailblazers both

DocMo

I assumed the same thing as Kline headers and cats have a much higher flow than GTS stock ones (you can definitely hear it). But at the end of the day the combination was a failure. I'd be interested in dyno results of a combination of Fabspeed sport headers with Xpipe.

Bacura

None of this surprises me. I have had 4 911's. On my first I did a lot of mods. On my current 911 I have done zero mods. All the money I spent on mods gave me lots of grief with zero/minimal gains. All these companies stay in business selling and convincing you it's an upgrade. Porsche has more R&D resources than these companies don't you think? It's your money but imho you are wasting it. Also, I don't want my car to sound like a race car. PSE is fine for me. I'll take more sound IF it adds more power. With age comes wisdom. You will learn just like I did.

John@Fabspeed

Sorry to see the results did not meet expectations in regards to performance, as much as Kline is a competitor of ours we always hope for the best for the Porsche community. The GTS has proven again to be it's own animal, and we are thankful to have worked with Magicrat to work some magic on it.

Larry Cable

very true - I wish I had learned that many many years ago - I would have saved myself a LOT of money!

DocMo

I hope I'll keep learning till the very end some people love casinos, other stripper clubs, I love cars, bikes and travel. Wisdom is good but lacks fun! In the meantime I try to be as sensible as possible.

MagicRat

I've got a Kline Inconel catback on order to go with my Fabspeed headers. Felix has said he doesn't think there will be much in the way of power gains, just a bit of responsiveness and a (switchable) lot of sound. Will provide a full writeup of course, though possibly won't do pre-post dyno as no power gains are being claimed.

Whatever we each may think of modding Porsches I think we can agree it's a good thing that people like Felix and the Fabspeed crew stand by their products and work with us to get the results we want. Out of interest (and from my now extensive knowledge of headers!) do we know if the Kline headers use the wider-aperture cat that the Fabspeed ones now do? I know both are HJS 200-cell, so you could just be finding the same GTS-specific issue that I did...

DocMo

I told Felix from Kline about your experience and he was aware about the GTS specificity. He thinks it might be due to the combination with the Xpipe. Who knows?!

DocMo

@MagicRat, how much did the sound increase with Fabspeed Headers?
In my case it's like 100%!!!! It seems very high flowing...my hypothesis it's too much flow hence some loss of power in low rpms.

MagicRat

Not much for me. Hardly noticeable. Maybe the Kline ones are louder or interact with the AWE in some way...

DocMo

In my case a huge difference in volume and tone.


Did you notice a change in the tone and quality of the sound after adding Fabspeed headers? If yes how would you describe it?


Thanks.

MagicRat

Been thinking about this a lot, so the answer's a bit complex!

When I first had the headers installed I didn't notice much difference. The installer even shrugged and said 'sounds the same'. After driving around for a while though, I noticed that the sound was a bit louder, but also a bit harsher - more metallic with a bit less overrun drama. This was odd and a bit disappointing, since with the original Fabspeed headers with the smaller cat the sound had been fantastic - a sort of mournful ghostly wail - and this wasn't happening anymore.

But I don't know whether the headers have bedded in or something, but I swear they sound better now. Had the car out for a long drive this weekend and thought it sounded beautiful. Louder than stock but no drone and lots of 'pap pap pap' when lifting off the throttle from high revs.

The car still does sound 'muffled' though, hence the incoming Kline. I don't want super-loud (hence why I sensed AWE wasn't right for me), but I do want a pure, cleaned-up sound, which I'm hoping the Kline will help with.

Let us know if Felix comes up with a solution for you.

DocMo

Thank you I will for sure keep you posted. But I am wondering if the few ponies are worth the hassle and sound quality deterioration risk.

MagicRat

Possibly not. I think a big part of this car game is knowing when one is onto a good thing and just doing nothing!

John@Fabspeed

Josh thanks again for providing the great/detailed insight on our Sport Headers. I am happy to hear the headers have bedded in to provide a more pleasant sound to match the performance gains they provided for you. Both Omar and yourself are very unique in that you've found yourselves in the rare position to have an exclusive vehicle unbeknownst to most to be it's own animal in regards to modification. I am very happy we were able to work together and followed through on our 991 Sport Header development, as based on your insight and testing we believe we have reached a perfect balance of performance and sound improvement