Review on NAVARME Non Return Check Valve Diesel Replacement Parts : Exhaust & Emissions by Joe Lara

Considering the low price, I expected these check valves to be pretty tough and need a little "touch up" by the end user. But I was very happy to see that they are quite nicely finished. Not to mention that I was particularly pleased that they run almost silently since I use them to regulate airflow. This is a notable improvement over typical ABS and silicone valves. The fact that you can open them up to clean them or even replace them with a heavier spring or baffle takes them even further than one-piece ABS valves. I try to find constructive criticism or cons, but I still see literally no cons in it.