It's K&N, what do I have to say more? ;-) Fits perfect and does its job hopefully.... My HHR has some other stuff to fix and change, so it's still standing at home, so I can say nothing about fuel mileage etc... Read more

Zoom zoom zoom, and it isn't a Mazda. I read about this filter on a few of the chevy HHR owners groups. There were NO negative reviews and more than a handful of positive ones. Most frequent comment was how this improved pickup and gas mileage. The other option was a filter/plenum unit for over $200 which allegedly did the same thing. Another option was buying a turbocharged HHR. Since I already owned a 2LT model (higher horsepower than the 1LT which, militarily, is backwards), which seemed a little like burning the candle of a 4-cylinder engine at both ends the turbo model I could have waited for seemed more like burning the candle at both ends AND the middle. With the same engine block and components, squeezing another 50 horsepower out of that engine doesn't seem to make good engineering sense. Something is going to give. So I bought this filter, and am happy with it. It give the engine the boost it needs to accelerate in and pass traffic and I HAVE noticed a preliminary 1 mpg improvement which is likely to increase as I'm doing more highway driving now. I think it will pay for itself both in gas mileage AND in replacement costs for the stock filter. I hate throwing things like that away - the stock filter is HUGE and very expensive - prior experiences with K&R filters on many motorcycles have proven themselves to me and you should buy one too. WARNING: this may be true of ALL vehicles you put K&N air filters in, but be prepared for the "check engine light" to come on as the oil from the filter MAY coat the/an oxygen sensor which will need to be cleaned and/or replaced. I have one of those code readers so when the light came on I plugged it in and got the codes for the sensor (yes, I checked the gas cap FIRST). Dealer was good, didn't charge me for the diagnostics again (they plug you in and it's automatically $100, the reader was half that and the codes are available online), just the time and effort for removing/cleaning the sensor(s). FYI. Read more

I've installed K&N filters in each and every one of my vehicles. I have used K&N in my off-road vehicles and daily drivers for years and enjoy the low cost of maintaining them. They have stood up to harsh desert off roading and relentless dirty storms here in the South West US. I just installed my latest one in a 2011 Chevy HHR. Access to the air box is unique, but once inside the filter fit perfectly. Snappy throttle response, and reliability is what I have come to expect from K&N. Cleaning and maintaining them is now part of your vehicle basic maintenance, but I enjoy knowing I have control on what type of product goes into my vehicles. Read more

Perfect fit, improved acceleration and gas mileage. Great value, highly recommend. Read more

I like K&N products Read more