I installed the Fabspeed bypass pipes and they sound amazing, like a cup car, however they are a little too loud for the driving i do on the highway daily especially at 3500 - 4200 rpm. While my stock mufflers are off, i am going to do the Gundo hack and reinstall them this weekend. I will post my opinion of the two.

997 Non-S

 

I just did the gundo jack Andrew Jay PUtnam did it for me It's sweet!!

 

By pass is L O U D...I mean L O U D and I like it L O U D but I have been in a Carrera S with by pass pipes and it get's a bit on your nerves after a while....forget talking on the phone.

 

That's why I think the gundo type hack is a best of both worlds solution Sounds amazing, and zero resonance

 

sound clips..

anyway guys..

anything to take note?

i think its 2 inch pipes weld on 2.25 inch hole?

i wonder what size makes the best noise?

how about larger than 2 inch pipes/

Anyway for those done at what cost?

do they sound louder than pse?

 

Any noted difference between 997.1 and 997.2 DFI engines? I find my fabspeed bypass not that loud at all, I have a 997s.pdk. Also a lot of drone at right around 2k rpm, which is where im at mostly in the city.

 

997.2 hack is quiet. Need center bypass to make it as loud as 997.1 hack

 

would that increase drone in cabin even more? I own a factory that can do ost welding mods for me but would like ur advise

 

Can still talk on the phone (when you're not on the gas)

 

i have no drone in my 997.2 with hacked sides and center X pipe bypass.. no droning whatsoever.

 

I was running fabspeed bypass pipes and quite simply, they were too loud for everyday driving.

The weight savings is noticeable, and unfortunately, so is the lack of low-end torque.

The bypass pipes are fun for a couple of weeks, but after that, it's time for something different.

As an aside, I'm testing out the AWE cans right now instead of the "gundo" hacked cans, and soon I will be putting them back on. I just love the combo of X-51 headers, stock cats and gundo hacked cans. They are superior to PSE in my opinion as they are lighter in weight and have a bit of a deeper sound.

YMMV

 

Gundo hack all the way and i have had everything!