* 1-8-4-3-6-5-7-2 This is a very common order.
* 1-5-4-8-6-3-7-2 Another frequently used order.
* 1-3-7-2-6-5-4-8 Less common, but still used.
To know the correct firing order for *your* V8 engine, you need to consult your engine's service manual or a reliable online resource that specifies the order for your particular make, model, and year. The firing order is usually stamped on a tag on the engine block or in the owner's manual.