Put a JVC KW-HDR720, dual-din, receiver in my son's vehicle and it rocks. :D However, as a result my 08 GLS stock receiver (CD/XM/FM/AM/Aux) is no longer cutting it. :( To remedy, planning to install the same JVC, dual-din, receiver in the GLS. 1) Anyone have previous dual-din install...

hey i have a 2001 hyundai elantra, and im trying to run 1/0 guage through the firewall. i found the little black box thing in the engine compartment, but i cannot find the 3 10mm nuts. any1 got help/suggestions/pics? thanks