Good Deal Squidley. Don't remember what Earl charges but they do have all the advantages that were listed. Cured my hot starts. And just starts better. I was going thru Cabella's last month and found a AGM on the discount rack for 51 bucks!!! I have the bigger cables so I'm probally looking at having to install that 4-brush on the shelf beside that extra battery. But you can ask Freebird, I don't have many extra parts.