🔎 Spectre Performance 3991 Black 9mm Breather Filter for Enhanced SEO Review

Great product for small secondary filters, A1 fit and design. I am using it as a replacement filter in a 2019 Kawasaki Vaquero Big Air Kit aftermarket, the aftermarket manufacturer sent K&N (junk) with their kit. I put this breather on the back of the motor where the factory system was, great fit, includes worm gear yoke also A1. If you buy this breather you will be very satisfied with the quality and performance.

I used this to extend the fuel vent on my Teryx 4. It gets the job done with ease. I went for the fuel mod for the first time a few days ago and it worked like a charm. It's cheap too!

I abuse this filter - I use it directly, connected to the crankcase cover. I have a small inverter motor generator. I clean it every six months with a K&N filter refill kit and it's fine.

Works great! Unfortunately it collides with the standard alternator/oil fill tower with the right hand hose from the fairing to the heater box on a '71 Super 1600CC DP engine. I bypassed that with the leftover hose as a temporary (ha) fix.

I use this item as an air filter for my onboard air compressor. For that it works very well. This keeps dirt out of my compressor. I would never use this or anything like it as a PCV vent. Your engine won't appreciate it, trust me.