Eddie Motorsports Optima Battery Box is ideal for trunk mounting of your battery. Features a billet aluminum construction and a polished finish. Mounts through base plate. Billet Aluminum Universal Battery Box for Optima D34 & R34 battery. Precision CNC machined from billet aluminum. Made in the USA. Eddie Motorsports MS374-75P Optima Battery Box, Polished Aluminum. Good fit and finish. By Kwik32 on March 10, 2017. Used to re locate battery to back of 48 Dodge. Yes, I recommend this product. Related Items / Suggested Parts. Optima Batteries 9014-045 Group 34/78 12V Yellow Top Battery. Speedway Motors is America’s Oldest Speed Shop® and has been a trusted source for specialty rodding and racing products and friendly expert advice for more than 72 years.