N55 downpipe stinks

[loesch]

What is everyone doing about the fact that there are no secondary cats on our N55s? I was thinking about getting an N54 midpipe to make my car a little less offensive in the olfactory department since installing my catless downpipe.

[Dackelone]

Originally Posted by loesch

What is everyone doing about the fact that there are no secondary cats on our N55s? I was thinking about getting an N54 midpipe to make my car a little less offensive in the olfactory department.

IF your car's exhaust smells... it has more to do with the type of fuel you are feeding it rather than how many cats your car came with!

Try switching fuel brands and/or octane. Some fuel have more sulfur than others and can produce that rotten egg smell from the tail pipe. Usually after the car has some miles 20K to 30K, this smell also goes away.

[WPG D33Z]

If you just installed it give it a couple weeks for the pipes to season and burn off all the crud inside. Took about a week on my car and the smell is 90 percent less now.

[theinfamousdrew]

Trade ya.......lol

[loesch]

Originally Posted by theinfamousdrew

Trade ya.......lol

I may just take you up on that if I can confirm others have tried this first. I'm not 100% on the idea just yet. Don't want to negate the benefits of the downpipe too much.

[Mr. Clarkson]

With no filtering, there's no way to get rid of the unburnt hydrocarbon smells (which smells entirely different than the bad cat sulfur smell). Luckily, I like the smell of hydrocarbons; smells like raw, nasty, badass speed.

[Dmacc]

True enthusiasts love the smell of that unburnt fuel

[loesch]

It just seems to detract from the refined qualities of the car. Also there's no fooling an inspection station with how powerful the smell is. I never realized just how much cats effect the odor.