hey my car has to get smogged in june and i want to put an sti catless uppipe on it while the engine is out of the car...

so will this cause me to not pass smog?
or would the smog be more affected by the downpipe if it was catless?

i know it's probably a crazy question but can you pass smog with catless up and down pipes?

i would love to be catless but not if it means taking it off in a few months just to pass smog.

 

you can pass catless DP through some shady place.

All you'll need is a catted DP and you should be good to go.

 

Is this a trick? you have almost 5k posts under your belt... haha

You can pass with a catless uppipe just fine. Just make sure the car is warmed up. As for the visual, the less shiny, the better.

 

I smogged my 02 with catless up and stock tbe - it passed fine. Unless the tech is super **** about the visual you will pass.

 

Also - make sure you're not tripping any CEL codes.

 

yeah i will be using a stock 05 sti uppipe so it definitely has a stock look.

I will just put the stock downpipe on so i can pass then swap it out afterwards.

do you typically trip a CEL from putting on a catless uppipe? is that common?

 

Stock WRX UP has an EGT sensor in it. Will trip codes if you don't either put a 2.2K ohm resistor in there or have it turned off in your ECU software.

Otherwise, STi UP is good and not likely to raise any eyebrows by a smog tech.

 

just recently passed smog with a Titek UP and cel fix with stock tbe. You should be fine.


2002 wrx

 

i passed smog with a 2.2k ohm resistor

 

where/how do i get the 2.2k ohm resistor?

 

radio shack. 4 pack for like a dollar. i have 2 extras if youre in the hayward area haha

 

i have passed a few months ago with a cat less up pipe but and had the other2 cats on

 

.... time for me to go into the smog guy too... only running one cat... the helix catted dp... lets see how that will go.

I hear that the newer subies (05+) had no cat in the up pipe anymore.

anyone go the the smog tech with injectors, and fuel pump etc? how did it go?

 

^^06 and up have catless uppipes.

 

smogged mine in Dec. I have 02 wrx, cattless UP, put on the stock DP, APv2 and passed just fine