These Direct mount on valve covers to provide a new unrestricted vent port
THESE ARE NOT RECOMMENDED FOR ROAD TRACK CIRCUIT USE
- GEN 3/4 'LS' 1997+ and GEN 5 'LT' helix type GM oil cap and many Ford with one or two tabs in the valve cover.
-'Holley cast LS' that use 1 5/16"-12 threads (fits other popular v/c as well such as Frankenstein & Motion)  NOT for 'sniper / fabricated' oil fill threads that are M32x2
-Ford LARGE Helix is most 2017 and older modular Based (1-3/8" base), SMALL is most 2018 and newer (1-5/16" base).
-Ford SMALL Helix and THREADED is 2pc;  The valve cover adapter and a port fitting per the size chosen.
-The 'Gen5 Pressure Vent' is the breather filter top with the one way action
-The 'Gen4 Pressure Vent' is slightly taller with a hose clamp on the breather, same one way action
-for crankcase ventilation HP ratings are: -6AN=600HP capacity, -8AN=800, -10AN=1000, and 12AN=1200HP maximum.
- The pressure release adapter is the original (and still the champ) one-way breather to add 1000hp of flow capability to your existing system! (GM / Ford helix type only)
Example Photos HERE
Made in the USA!