Umm, haven't seen Pro Tec brand air filters.
The only Microgard air filter I've purchased was from Rockauto, and was from Fram had the Microgard contract. It was marked Made in USA. I couldn't personally tell a difference between the Microgard MGA9401 & a Fram CA9401. It's been in my truck's air box just sjort of a year, 1 more year and it'll be replaced by a Fram Tough Guard TGA9401. I paid $1 for it, I consider it a great value.
Edited by Nyogtha (04/01/18 10:23 PM)
"No matter how paranoid you are you're not paranoid enough. Tell the truth. Reach as many people as you can with it. That's your weapon." - Susanne Modeski, aka "Holly" to The Lone Gunmen