Quote Originally Posted by theman440 View Post
Go fast goodies
I have used those for many years but have come to the conclusion that they are a bad idea. Exhaust back pressure/check valve location is very important but more importantly I find that the check valves easily fail and when they do you actually pressurize the crankcase.

Foe me just good K&N breathers now.

Good luck with the build! Fun times. I am building a 505 aftermarket block motor right now. Not going too good...........