Working to original drawings, these brand new cylinder heads are designed to the original factory specification. When fitting an aluminium head, you must run with 100% antifreeze/summer coolant that contains the correct inhibitors to prevent corrosion and electrolytic reaction. We recommend you use new hardware, nuts, studs etc... When fitting these heads to ensure a good fit. All our 5-port heads are supplied as fully machined bare heads, with bronze valve guides and lead free valve seats. Orders placed after 1.00pm on a Friday or over the weekend get dispatched on Monday. Small orders are sent 1st class post. Transit times vary from country to country but are typically 2-5…