i don't think it has as much to do with the test pipe it self as it does with the defouler you use, your sensor, and your ECU..

because the test pipe is just a plain old piece of pipe. the sensor is what detects the pollutants, and the defouler is what keeps it away from the exhaust flow.

but i could be wrong..

 

clay bar your car :\

 

..hmmm i was thinking about buying the invidia TP, but i'd really be against any sort of bumper staining..is this really a huge issue?

 

^^it goes away when you wash. it's just like soot on the bumper. it won't be noticeable on your laguna unless you leave it on forever.

 

not really.. just wash your car regularly.. (dont wait for a few months to wash it) and even so, if it "stains" the bumper, you just need to use claybar to get it off.

 

claybars are my answer for everything nowadays!

 

Well the first part of beating crack is admitting there's a problem, we're all pulling for you to get help soon.

 

I just took my cat off yesterday to pass an inspection and I am thoroughly impressed with what a difference the TP made. Can't wait to put it back on. My S feels much less responsive and the sound is a LOT less mean now.

To compare the smell of the TP, basically I equate it to riding my snowmobile. When I stop with the top down or sit in my parking garage with the engine warming up it smells like a 2 stroke engine to me.

 

Ive had a TP on every car I have owned, call me crazy but I luv the smell!

 

If you keep your bumper waxed it'll wipe off easy.