4sPanamera

I have my 2011 Panamera 4s in a shop doing the exhaust with 2.5 tubes, removing the silencers as they call them and putting flowmaster exhaust.I am not in the usa or a country that has smog checks.I was reading that the Panamera has 2 front cats and 2 rear cats and the rear cats dont have O2 sensors??.True??? I dont know.I want to remove the restriction of the rear cats but dont want check engine lights
Any ideas from your experience

4sPanamera

Ok we are removing them (cats) and flashing the computer to avoid check engine light codes.Anyone want pictures of the new pipe setup without cats ?
They say with this work done (change exhaust, remove the cats and flash the computer) it will increase the HP by 60 hp....anyone agree

Outlaw

knowspin

RDS928S

https://www.6speedonline.com/forums/...-4s-turbo.html

4sPanamera

I got the car last night the sound is amazint straight pipes with the o2 sensors in the pipes,it is straight out with flowmaster exhausts.I have the original parts in case we want to change back.There is more power for sure and I am sure it is more than 6hp.They said the cats looked to be clogged. I was saying 60 hp with the flash and the exhaust , but maybe not 60hp with the flash and exhaust but imagine 30 to 35 easy. But the car is a different animal

V124ZA

I agree with you. I did this mod on a Cayenne and Ferrari 599; didnt notice any real gains but did notice slightly smoother shifting. But, sounds GREAT! So enjoy!