was at the dealer ship today for oil change and service,. so after lifting the car the guy noticed i had bypass pipes on the car,.. so he started saying that its not good for the engine and porsche had it on for a reason, what do you guys think?? is he a retard or is he right?? though i like the car with the bypass pipes on better...

 

Retard

 

lol,..
he was like listen to the engine its not breathing well,.. and all this bull**** blablabla...

 

I am pretty sure the motor will breath a lot better with bypass pipes then with cats. Are you sure this guy was smart enough to change your oil?

 

I wouldn't be that sure. Low restriction catalytic converters are about standard on any modern car and don't present a noticeable restriction to engine breathing. The old plugged up ones went out with fuel economy standards going up.. a restrictive cat-converter will cost MPG, and that's something the car companies pay a lot of money to maximize.

Bypass pipes = noise (which makes the truck seem faster/more-powerful) unless you're running a turbo and have done a tune to optimize the mixture without the cat-converter.

 

I had my GT-S in to the stealer for an oil change recently and the tech (who is the only one there that I let work on either of my P cars cuz he has been there forever and is a "car guy") was complimentary of the bypass pipes and opined that the GT-S now sounded and drove like it should have originally. I don't know about any true gains but the fun factor for me has gone through the roof with the bypass.

 

op, did you call him an idiot or just look at him like he was one?

 

I've heard this theory over and over. Yet when I installed a high flow car on my 951 it totally killed the car. Felt like someone had neutered it!

 

there are Porsche dealors who sell & install the by-pass parts.

 

Yes, he's a retard.

Keep in mind that the Cayenne has 4 sets of catalytic converters (well kind of).
You see, the second set aren't real cats, they are noise baffles. I know this for a fact because we cut them open once, and a professional muffler guy looked at the insides.

So, see, you are smarter than the guy at the dealership (which isn't that hard these days). Personally, I don't know where they find these guys, but you would think that with such an expensive product they would get at least a fundamental understanding of the vehicles, but in fact they don't. You can learn far more by participating in these forums.