Alright, I have a 99 Integra sedan, and I just put in two amps. (RF Punch 250a2 and a RF 400a4). I spent the entire afternoon trying to find a decent grounding point...........and I am still catching a lot of noise. At first I tried to just ground it to some sheet metal in the trunk.......not good. Then I tried to mount it down by the spare tire.........no better. Then I took out the rear seat and mounted it to a bolt that holds the back of the seat in place........better, but still not great. Then I tried to mount it to where the seat belts are attached, but the bolt is way to big for my ring terminal (Stinger gold plated ring terminal connected to 4 ga grounding wire).........right now I have it mounted to the metal next to where the seatbelts attach.......it is marginal at best.......what should I do? Any suggestions? Is there an easy fix for this? And before anyone suggests sanding the paint and stuff away to get a "clean" fit, I already did that. TIA.