K&N parts matching AC Delco A3178C air filter

The AC Delco A3178C air filter cross references with the K&N air filter parts below. K&N offers compatible air filters for many AC Delco air filters giving you an alternative.
ProductPart NumberProduct Image 
K&N Replacement Air Filter
  • Designed to Increase Power
  • Million Mile Limited Warranty
Roy Calabrese, Newtown, Pennsylvania
This is a great replacement filter. There is noticeable sound improvement. Nice job K&N.
George Manns, Florida
I haven't driven car far enough to see if there is a mileage increase .. Plan on doing that soon.. I have been using K&N filters for years and they do make a great filter.
Bob Miller, Midland, Texas
Very pleased. Heard replacing with the K&N air filter in an ATS 3.6 solved an unsteady idle issue - and it in fact does just that. I instantly noticed an improvement. Not that it was ever really bad enough for comment though. However, with a change from the OE muffler to a pair of Magnaflow's plus the K&N air filter improved highway fuel mileage during my trip to Florida and back (I just got back late this afternoon). We're talking over 3000 miles total. Same trip back in May couldn't match EPA highway numbers - this trip slightly exceeded the EPA number of 28 mpg highway. And my ATS Performance Edition 3.6 now owns a serious bark plus better performance and better fuel economy. Now, guys, where's the coldair intake system? Had it in my 2006 Pontiac Grand Prix GXP.
33-2496 K&N 33-2496 Replacement Air Filter
List Price: $88.89
Your Price: $56.99
K&N Replacement Air Filter
  • Designed to Increase Power
  • Million Mile Limited Warranty
Timothy Donihue, Las Cruces, New Mexico
Once again I am completely satisfied with my filter. More horsepower, better throttle response (and even though K&N doesn't advertise fuel economy) I am getting much better fuel economy.
Michael Tong, Vancouver, Canada
This filter is good. I love it's saving me huge mpg of gas compared to the stock. The filter still works great, but overall the K&N filter is better. But I wish they have the K&N cool air intake instead, but this filter will do it for now.
Frank Pancoast, Latrobe, Pennsylvania
Very good air filter! It gave my car more power and better gas mileage. Very pleased with the K&N store. Also fast shipping.
E-0650 K&N E-0650 Replacement Air Filter
List Price: $94.69
Your Price: $60.99