After searching, I could only find bits and pieces of conversations about this so I thought I would start a post on what diode to use as I'm guessing others will search for it after putting an AGM in their cruiser. I just put the Slee group 31 tray and the Interstate 31p-AGM7 in it.
www.interstatebatteries.com
I did cheap out and purchase a home built diode booster on Ebay as it was much cheaper than the Australian alternatives. Nevertheless, it boosted the voltage but also illuminated the battery light on the dashboard. Not wanting to see that all of the time, I was curious as to what product others have purchased to accomplish the voltage boost and not have the light illuminate.
On another note, the positive terminal is super tight. I pulled the clip that holds the positive harness and was able to move the harness up a notch or two but still didn't help a ton. I was debating grinding the corner off of the bottom of the extender to give it some slack. Anybody else have that issue?
Interstate Batteries - Product Detail

I did cheap out and purchase a home built diode booster on Ebay as it was much cheaper than the Australian alternatives. Nevertheless, it boosted the voltage but also illuminated the battery light on the dashboard. Not wanting to see that all of the time, I was curious as to what product others have purchased to accomplish the voltage boost and not have the light illuminate.
On another note, the positive terminal is super tight. I pulled the clip that holds the positive harness and was able to move the harness up a notch or two but still didn't help a ton. I was debating grinding the corner off of the bottom of the extender to give it some slack. Anybody else have that issue?