This head comes as pictured, stock assembly with the stock stainless valves, steel retainers/locks, 22 pound springs, and extra heavy heat treated stamped (1.15 to 1.2 ratio) rocker arms.

We can finish it for you as shown in the "worked over pictures" OR send as the stock assembly (please see options).

The chamber size is 18cc and the exhaust bolt pattern is just slightly wider than a standard clone/predator head but you can still use a standard pipe if you oblong the bolt holes.

They will come with the stock 22 pound springs in them, other options available here or on the shredder casting listings.

Note: the stock seats in this head are .975 +/- .010 (intake) and .845 +/- .010 (exhaust) even though they are supposed to be called 24/28 mm you will want to open them up some for the best flow. The stock exhaust id is fine with the stock valves but the intake id needs to be worked over to 1.025 to really be effective. Yes, the seats have plenty of material to make this possible. The casting is heavy and rough finished, so porting is really needed on these to take it from a good head to a great head, don't let people tell you otherwise or all you really have is a "head of the week" that will always have more potential that's not being utilized.

If you plan to use the stock rockers with high lift cams (above .300") it is strongly recomended to extend the rocker slot in order to prevent rocker stud to rocker bind/failure. If you are unsure please contact prior to purchase.

If port matching the intake manifold is desired please let us know and either buy one from us or send us yours, I believe that is also a critical detail that most guys miss.

For finished heads please allow 2 to 3 weeks to ship depending on workload at the time