There are two ways of finding the correct key for your engine:
If you have a key and just need a spare, there will be a number stamped on the key. Just supply us that number and we will be able to get you the part number to order.
If you do not have the original key, you will need to look at you ignition column. Under the ignition cover (where the key goes in) there is usually a casting of the matching key number. We would need that number.