Just put in the stainless battery tray from stainlesstrays.com and it fits great. I am trying the X2 battery that I picked up from Batteries Plus. It was only $20 more than the blue top group 34 optima and comes with a 5 year unlimited warranty. Plus all of the optima batteries they had on hand were the mexico versions and the X2 is made in the USA with more CCA than the optima. I plan on buying the driver side tray and installing another battery in the next couple weeks.