Fabspeed Motorsport

That would be fantastic. If only we had the space. Unfortunately, there is only so much space to do everything. You can't build the LT headers correctly without getting rid of some pieces to the puzzle. Long tube with a cat and side mufflers would be to long to fit in the envelope of the car so you have to get rid of something.

drdonger

Hi Fabspeed, I had a few questions in my previous thread I was wondering if you could help answer.

1. Are 991.2 headers new or the same as the ones before for the 991.1 GT3 and GT3 RS?
2. Are they made out of 321SS or T304? Is T304 suffice or is it more likely to crack than the 321SS?
3. Will the o2 bungs that eliminate CELs. If there are any CEL’s can we return the product. The Dundon o2 bungs look much longer, is the reason I ask.
4. Can you make valveless side pipes or a single side pipe to work with aftermarket rear center sections?

Thank you

John@Fabspeed

1. Are 991.2 headers new or the same as the ones before for the 991.1 GT3 and GT3 RS?
Yes - just verified them to fit the .2's
2. Are they made out of 321SS or T304? Is T304 suffice or is it more likely to crack than the 321SS?
T304 - fatigue strength/temperature factors between T304/T321 are minimally different and T304 has proven to be more than sufficient for these applications.
3. Will the o2 bungs that eliminate CELs. If there are any CEL’s can we return the product. The Dundon o2 bungs look much longer, is the reason I ask.
We have a great success rate with our O2 Sensor Spacers w/Mini-Cats but can never guarantee them to 100% prevent triggering Catalyst Efficiency CELs.
4. Can you make valveless side pipes or a single side pipe to work with aftermarket rear center sections?
Yes - we offer our Side Muffler Bypass Pipes in Valved or Non-Valved

Feel free to PM me with any questions or forum pricing

drdonger

Thank you!

John@Fabspeed

Ultra Violet 991.1 GT3 RS - VS - Miami Blue 991.2 GT3 - Both equipped with our Competition Long Tube Headers

We were lucky enough to have both of these gorgeous machines in the shop at the same time - so we had to have a friendly competition.

Who do you think the winner is?


For more info: https://www.fabspeed.com/porsche-991...header-system/

CAlexio

Sort of indistinguishable.. as one would expect no?

AhsanU

Never understood the point of a "rev battle" with the GT3 at a standstill, can't rev the car past a certain RPM and they all virtually sound the same.

Can we get some in-cabin video or fly-by's?

sechsgang

The Long tube headers for this car REALLY kick ***...nice competitive pricing guys.

John@Fabspeed

Let me see what I can do

They really do - thank you!

drdonger

hayn911gt3

Hey Alec. What's your thoughts of just doing the side muffler valveless bypass and keeping everything else stock?

John@Fabspeed

I think that's a great upgrade and usually my recommendation for starter upgrades - gives you a more aggressive tone without being too overbearing. Sheds a good bit of weight too

hayn911gt3

Hey Alec. Any updates on the cars that installed just your side muffler bypass pipes for the .2 GT3. How do they compare with those who just replaced the center muffler?

Lukas56

Hi Hayn,

I have bypass on mine 991.2.. Will try to post something when will be some free moment for that..

Lukas

John@Fabspeed

Thank you Lukas!

We've gotten great feedback on doing just the Valved Side Muffler Bypass Pipes, which is usually my first recommendation for the .2 GT3's.

I drove a .2 GT3 with our Valved Side Muffler Bypass and it really gave the car a nice tone, deep/throaty and by no means obnoxious or overbearing. I personally didn't notice any drone either. The Center Muffler Bypass is a bit more aggressive.

I'll see if I can find some .2 videos. In the meantime, here is a .1 GT3 with just our Valved Side Muffler Bypass for reference: