I ported my own head because i was too broke to have someone else do it for me. Many hours and a dremel and alot of sand paper and other stuff to polish it I was done. Got her runnin and Ill be dammed it made a huge difference. Really need a swingarm bad now.

 

what kind of quad?

 

660 raptor. Its got bigger valves and a stg2 cam 12.5 to 1 102mm piston and valve springs