Have you failed smog and what mods caused you to fail?

[Gogogordy]

Originally Posted by YarisSedan

So my car is a 08 which means next year I will have to smog the vehicle since I live in california. If your in a area that has emissions testing were there any mods that caused you to fail such as underdrive pulley, Things im worried about and have known to fail smog are intake and exhaust unless there is a carb sticker.

Always save your OEM parts in California in case a re-install-for-smog is in order.

My Mini Cooper S was highly modified....all I needed to re-install (temporarily) was the factory air box for testing. Thankfully.

(Oh, I did that preemptively)