One of the biggest constriction points on the 966 Carrera is the OEM Manifolds as exhaust scavenging and flow are compromised due to uneven OEM Primary Tubes.
One easy way to mitigate this issue is Fabspeed's equal length Sport Headers. Our Sport Headers provide improved torque and equalized engine pulsing thanks to industry-exclusive mandrel-bent primary tubes.
Fabspeed's Sport Headers are a direct bolt-on upgrade/replacement of the factory headers on all Porsche 996 Carrera vehicles. Creates+15 HP (whp) +12 TQ (ft/lbs) and saves -2 lbs.

https://cimg4.ibsrv.net/gimg/rennlis...86b1eaaacd.jpg
https://cimg5.ibsrv.net/gimg/rennlis...36398b6777.jpg

https://www.fabspeed.com/porsche-996...sport-headers/

Please feel free to PM me with any questions or for forum pricing :)

I have Fabspeed mufflers, interested in installing these Fabspeed Headers, but I have seen that one can never get all the bolts out when removing the old headers without breaking one or more studs. Anyone that may have removed their headers ever dot it without breaking any of the studs. If you did break any, how succesful were you removing the broken stud.

Tighten the bolt slightly before breaking loose. That’s the best way. Might be even better to also add heat. Using the stomski tool makes it easy.

Ive heard talk of the stomski tool, exactly what is it and where do you get one?

Lol , in takes , chipped , headers , 200 cell cats and mufflers 8 k spent , youre lucky to see 8 hp total improvement on a motor that sees 100 hp/ litre stock on the rolling road

You are probably right, without other mods just replacing exhaust system wont do much for performance.

Let's see the test sheets