Hmmm. My Dodge guy did the install and I helped him with the removal but I don't remember replacing a bottom tray. There is a small metal OEM plate that essentially hooks the OEM battery down and then you screw down that to secure the battery. The bottom of the DCR replaces that metal plate so you can remove the OEM piece and just store it with your factory battery.
I spent two days at the drag strip with the battery and there were zero issues!! As a weekend driver, I did have the Tazer installed and if the car is left sitting for a week with that constantly draining the battery you will need to jump it. However, it comes with a battery tender so as long as you use that if you're only going to drive weekends there are no issues at all. Voltage was always right at 14.0.
If you're looking to lose significant weight to help your quarter times this is easily the best mod out there. If you ever have any issues I'd be happy to work with you and DCR to ensure you're taken care of from a warranty standpoint (full disclaimer: not sure if warranty transfers but since they are a small company so I'm sure they'd work with us). If I didn't sell my car I wouldn't be selling this battery that's for sure!!
The bottom plate has a hole for fastening the battery, in place of the OEM clamp.
The battery strap also gets removed.
Used it for a while, after run cooldown at the strip can be managed by keeping an eye on voltage.
It weighs about 9 lbs
One tip- at the strip, use an extra long cable tie around the emergency trunk release, and let it hang out the back, because if the battery goes undervoltage, you do not want to have climb through the car to open the trunk(ask me how I know)
and I also purchased an emergency little jump box from duracell(weighs less than a 1lb, charges through the usb), just in case.
I love my DCR racing battery, 500 is an awesome price