Trying to figure out if I need to buy a N20 filter for my new NX kit I bought, and if I should what brand I should get. The first and most obvious choice would be NX...but they run 50 bucks, and a NOS brand filter is only 18 bucks. Whats the difference, and what should I run??

 

You don't run a filter on the car when you are racing it. You want to use a filter when you fill your bottles. Some of the good shops will run at least two filters, one between the compressor and the pump and another between the pump and the fill head. If you are unsure of what their setup is provide your own filter and have them fill through it. NOS and NX both provide quality parts, use what you think will work the best.