got this for my 08 scion xD. had to pull off the bumper to get in on, but it really wasnt that much work to get it going. went with the polished because i heard the MAF sensor wouldnt fit right in the powder-coated one. everything went in quick. throttle response is nice, and you notice the gains at the higher rpm range. not so much at the lower range. engine breathes much better too.