K&N parts matching Pronto PA6139 air filter

The Pronto PA6139 air filter cross references with the K&N air filter parts below. K&N offers compatible air filters for many Pronto air filters giving you an alternative.
ProductPart NumberProduct Image 
K&N Replacement Air Filter
  • Designed to Increase Power
  • Million Mile Limited Warranty
Jose D, Chicago, Illinois
Super easy installation on my 2016 Q70 3.7L. Two clips and the tops come off, slide out the retainer tray and gently pull on the old filters to remove them. Ensure the new filters have the longer tab on the topside and reinstall pastic retainer tray, refasten clips and all set to go I haven't seen lower full efficiency, actually just about the same. Overall, better lower end torque and smoother acceleration in the lower RPM range.
Mr. C, Denton, Texas
Easy install, slight fuel economy reduction of approx 2mpg, but whoa.... did these filters fill in the blanks on power smoother acceleration! Exactly what I expected, and at least another 20hp.
Bo Lawrence, Austin, Texas
I've been using K&N air and oil filters for many years now, cars and motorcycles. The last car I had was a BMW 525i and I consistently calculated a 3-4 mpg (highway) improvement in gas mileage. I recently purchased a 2012 Infiniti M37 and am averaging 2-3 mpg improvement on the highway. I just like the fact I don't have to change the paper filters often and do notice better gas mileage on the highway which makes me feel a little better since I have to use premium grade. When I checked all the auto parts stores they didn't have them or told me they were on backorder. I called K&N directly and they were shipped out quick. Customer service was above average and worked efficiently. And if you ever decide to engineer and sell automobile CABIN FILTERS that have carbon/charcoal layer and are oiled with a light scent, SIGN ME UP! I hate changing the air filters so often. There is a model of the Infiniti that has a feature called Forest Air that people seem to love. Unfortunately, mine doesn't have it. Just sayin. Thanks.
33-2440 K&N 33-2440 Replacement Air Filter
List Price: $127.79
Your Price: $82.99