It does include O-Rings, Chrome acorn Nuts & sealing washers also. 20cc Domes 64-66 mm bore, they add about 12-15 lbs more compression compared to the stock head. 64-66 mm bore, they add. About 8-15 lbs more compression compared to the stock head.
We carry 20 & 21 cc domes as they are the most requested, you may also request 17, 18. 19 cc domes but they will take us 7 days to get at no additional charge just Patience. You may also request big bore domes from 66.5mm-68mm bore, cc size 17, 18, 19, 20, 21, 22, These will also take us about a week to get at no additional charge, just patience. We do have another listing with this shell alone, no domes.One Piece Design Allows for Maximum Cooling without having to replace the stock studs. Modquad Cool Heads have one of the largest water cavities produced, holding up to 35% more water than others. Our new one-piece design has an open flow between chambers to equalize water pressure and increase water circulation-for improved cooling, added protection and horsepower.
Our head uses stock studs that do not have to be changed. The Modquad head comes complete with copper washers, acorn nuts and O-Rings. Machined from 6061 aluminum in the USA.