Picture represents all Air Shut off sizes
5" Cast aluminum air shut off
Opening is 4.5"
Air shut off attaches directly to Turbo housing, no air cleaner is used, or a rubber boot can be used.
Springs are included
Air Shut Off is triggered by a cable that is not included
Air Shut off doesn't say "Preble Diesel Performance" this is a water mark for picture purposes only
| Airshutoff Size | Opening (ID) | Overall Thickness | Overall Width | Height Closed | Height Open | Flange Width per side |
| 3" | 2.5" | 1.875" | 4" | 5.5" | 7" | 3/4" |
| 4" | 3.5" | 1.875" | 5" | 6.75" | 9" | 3/4" |
| 5" | 4.5" | 1.875" | 6" | 9" | 11.25" | 3/4" |
| 6" | 5.5" | 2" | 7" | 10" | 14.5" | 3/4" |
| 7" | 6.5" | 2.5" | 8" | 11" | 15.75" | 1" |