Ever need a cheap and stout air cleaner spacer for 5-1/8" carbs? Aftermarket can be real POS. Check PnP for GM TBI's w/ 5-1/8" flange. These shown were from 4.3L Blazer TBI's and only cost a coupla few bucks apiece. Cut tube off and blank hole. I use a knockout from electric junction box, MIG from inside, paint to match.
Raises air cleaner 1-1/4"... and they're stackable.
