Well, I am with the guys that said the "Spare Tire" area. Thats where mine is. I would also buy a remote bottle valve so you can control the opening and closing of the bottle from the drivers seat. Before I had the RBV I would leave the bottle open all the time (can't get at the valve) and I would lose nitrouis. I still don't know why?? If you have a carb you better install a elect. fuel pump in conjunction with your mech. pump so you can maintane 5# of fuel pressure at WOT. If you install an elect. pump make sure you also install an oil pressure switch. Thats a must!! I also have an elect. fuel pressure gauge in the car. If it dosn't read right I don't push the green button.

Auggie

PS: I hit the New Post by mistake