ive seen every jdm rear seat install on the net, and now that ive done the install myself i did a few things of my own and i want to put them on the table for others thinking about doing the install to provide another option for installs.

this imo is the cleanest way to do it:

to get you up to speed, this is what was already done before this point:
-bought a jdm seat
-bought all brackets needed - had to source them from NZ, they actually cut out a chunk of the body of the car for the lower mounts so i could drill them out myself the way i chose(2 top strikers, 2 swivel lower brackets, and two lower base mounts)
-next i drilled out the spot welds on the lower base mounts (4 spot welds each) and seperated the bracket from the body - i used a 1/4" drill bit followed by a 9/32" bit finally.
-then i made sure the rivet sleeve fit in the hole but not too loose
-then i bolted the lower bracket to the swivel and the swivel to the seat, removed the rear interior and bolted up the striker. with the seat locked into the striker i snugged the brackets up to the body properly and marked at least two of the holes that i could reach easily.
-removed the base brackets and took the seat back out of the car.
-put the bracket back on the two holes and mark the remaining 2 and then put away the bracket and drilled my holes.
-next i made sure all the holes lined up with the bracket and thats where this rivet type gun comes in....

i picked up a sort of rivet gun, it uses short sleeved rivets, for 25$ i got the gun and several sizes of sleeves and adapters with about 10 pcs of each, i only needed 8.

the sleeve size i used was a 10, and the bolts i used later are also 10 for obvious reasons.

these 3 pics show the rivet sleeve and give you an idea of how it works, you thread it onto the gun and place it into the hole of both the bracket and the body, making sure its snug up against the body you squeeze the handle and it compresses the sleeve where you see the neck part with no threads, this gets compressed creating a beveled edge of the back side of the body under the car.












the next pics show how the sleeve looks from the back side. at this point the sleeve is secure and the bracket is safely anchored to the body, but i went one step futher and for a nice clean install i filled the holes with bolts i got from a hardware store. this fills the hole so that you dont have light shining through your bracket holes, and also makes it extra secure.
if you are super paranoid you could even use longer bolts and put nuts on the back side, but this is not needed at all.

to finish off this install i will use a small amount of undercoat to cover the rivet sleeves and a shot of paint on the interior to prevent bracket rust.

 

I call it a nutsert, we have pneumatic guns to compress them, also i used rivets and it doesnt show as much in the fenderwell. Just wanted to let you know that is now how you use those. Drill the holes the size for the nutsert, insert nutsert and compress them, put your bracket over them, put bolts in and tighten. the way you did it makes no sense but "to all there own". BTW if you know anyone that needs a seat i have posted mine on ebay.

 

your seat on ebay is by far one of the best ive seen for sale. we just bought my wife a crx and im trying to convince here we should buy it for hers haha

 

i did it this way because if the bracket went over the lip it would be raised and have slightly poor fitment...imo this is a better way, this way the bracket is snugged right up against the body.

and if you wanted to shorten the length in the fenderwell all you have to do is sheer off a bit with a dremel...but its not needed, you wont be able to see it when its undercoated.

 

Cool.