Ronstan Track - Series 19 - End Cap (30mm x 26mm) stuffing box these are 3/8 unc into

these are  3/8 unc into head reduced to 5/16  manifold studs while port alignment with cylinder heads is the same the clearance for a larger stud and nut makes them difficult to fit

Complete assembly includes filter cartridge

Dual Function Control:Side mount single lever control

-8 AN Threads

Mount Tab Notches Center to Center:7"

Ronstan Track - Series 19 - End Cap (30mm x 26mm) stuffing box these are 3/8 unc intoPatented system uses low profile cars running on twin races of acetal ball bearings. Cars use the existing luff groove of the mast (no track or installation work required). Ball bearings are captive for easy loading and unloading of cars from mast. They can be easily switched between fully battened and soft luff mainsails. Minimum distance from mast to mainsail luff enhances mainsail efficiency. With a complete range of car profiles and feet there is