This is A BRAND NEW ADA Billet Performance head
Fits all Kawasaki 550sx Jet Ski Reed models from 1991-95
Does NOT fit 82-90 piston port motors
These high quality heads are a great way to increase the bottom and top end performance on your 550sx model
The included domes will run 180psi with stock porting and at sea level. This number will vary depending on these factors.