I just use a black Interstate battery with the Nissan battery cover and it looks the same (except for the Yuasa logo). However, I think that if you don't have a Nissan battery you will get dinged for it if you show a car in the judged stock class at a Zcon.

FYI- Interstate Batteries supplies the replacement batteries for Nissan. Additionally Mike is correct if you are showing your car at ZCON in the stock class you will loose points for a non-Nissan battery.

Keith or any fellow Z owner who is planning on showing a Z at ZCON in the stock class, feel free to PM me and I will pass along any tips I can to help you. The bottom line is generally you can plan on them picking fly sh-- out of pepper when the car is judged.

Just found this pic of bigfoot carrying the Yuasa N50 Battery. I know we are getting close now.

FYI: Tractor Supply 24C

http://www.tractorsupply.com/tsc/product/exide-classic-auto-truck-suv-battery-24c?cm_vc=-10005

http://www.gsbattery.vn/en-US/yuasa-n50-12v-50ah-battery

 

YUASA Sticker: http://jdm-car-parts.com/products/yuasa-battery-look-alike-kit-datsun-240z-260z-280z