what do you currently have..........a 040, 043 or 311 head ? They all have differences, so its probably best to try and match what you currently have 👍
binner ·
stock 1600 replacement head, dual port, 35.5mm intake, 32mm exhaust with the step in the chamber.
Doug Sweetman ·
Casting number under the rockers will start 041, 043, 311 etc.... I think port shapes and casting thicknesses are different