WHAT A HUGE difference this K&N air filter made in the first 5 minutes - bought my 2018 Camaro - it was a leaseback and the dealer replaced the cabin filter (didn't change the engine filter but - never mind) - changing the cabin filter on a Camaro is a pain - but - after fiddling with the glove box (about 5 to 8 minutes) - after removing the original GM filter and getting into a K&N - IMMEDIATELY noticeable freshness in the cabin air - wow! - VERY worth the money.