Yesterday, I was installing an aftermarket exhaust. I took off the belly pan, diffuser and got the exhaust installed. I put everything back together. Everything went back together perfectly. I went to install the belly pan. I mounted it up with the 2 big bolts in the center, then went down where the diffuser and the belly pan meet. I put the 5-6 8mm belly pan bolts on. Those went on fine. I went over to the driver side where the three 8mm bolts bolt into the frame. Those 3 went on fine. I went over to the passenger side, I was only able to get 1 bolt to thread and snug it up. That was the one closest to the rear. The middle one and one closet to the front will not thread on for the life of me. I spent about 30-45 mins trying my ass off to get this to thread in and nothing will work. I am out of ideas on what to do. Is the part stripped on the frame where the bolts go into? Should I helicoil it? I took the Lotus for a quick spin and I was able to hear a small rattle under the passenger seat. I figured that was the belly pan going up down touching metal on metal with the air flowing through. That sound will drive me crazy. Need to fix it. Anyone have any ideas what would be the best fix to get those last 2 screws in there?