If your looking for clean 4 door GSR here it is for sale: www.cardomain.com/ride/676757/
Its lightly modified with bolt-ons like 4-1 dc headers, AEM Cai, Apexi full catback exhaust(sounds like a 350z), skunk coilovers w/ tokico shocks for stiff ride, red carbon fiber hood, and custom jl system. Everything else is stock as in engine and interior. see pics for yourself. located in southern cali.