Air Filter?
 

Since I don't have one yet, what type of air filter does the HHR have stock? Flat rectangular or round cylinder?

I found a close-out on K&N's locally and wanted to see if there was one there that could be easily adapted. Can't beat the $15 price if I could make it work.

I haven't taken it out yet so I'm not sure but if I had to guess I would say square. The GM part number is 22731072 if that helps.

K&N is currently working on a replacement kit that will increase both mileage and performance to a degree. It should be available by the end of the year if not sooner.

I'll post pictures as soon as it's done.
-Mike

it is a square filter i went to k&n site today and it is square

K&N #33-2339
 

My local parts guy got one for me overnight. Only bad thing is I don't have the HHR yet. I just ordered it Tuesday. Oh well, that gives me more time to buy more goodies. :hhr:

when someone gets one I'd like to know if it actually helps milage or performance noticeably.

I don't have one but I can answer your question. NO! It's just an air filter. :roll: It may help gas milage and add HP but nothing you'll notice. ;)

K&N display
 

Has anyone seen the new K&N displays in the parts houses. Pretty slick.
They have a Lexan box with a place in the top to install a filter. You turn a switch on and a fan pulls air through a Fram filter and exhausts the air out of a round Lexan tube at the rear. You then replace the Fram with a K&N filter, and when you turn it back on the increase in air flow causes a ping pong ball, that has K&N printed on it, to rise to the top of the exhaust tube. Of course with the brand X filter in place you never see the ping pong ball. It seemed like a good reason to go ahead and order my filter and renewal kit. :roll:

Stay away from a oiled filter, unless you like cleaning the MAF all the time. Go with a high quality paper filter.

That is the first time I have heard anyone state that you can have sensor problems by using an oiled filter. I have known quite a few people that have used K&N filters on other applications without any problems. Do you know this from first hand knowledge?