| Infiniti | Model Year | Closest distance between forward towers - (M1) | Distance from uppermost windshield to forwardmost tower foot - (M2) | Closest distance between rear towers - (M3) | Crossbar spread distance center to center - (M4) |
| G20 | 91/96 | Q14 - 35 7/8" | 6" | Q16 - 34 5/8" | 30" |
| I30 | 96 | Q23 - 37 3/4" | 4" | Q23 - 37 1/2" | 34" |
| M30 | 90/91 | Q24 - 36 7/8" | 3" | Q24 - 36 1/4" | 14" |
| M30 w/ Q Strech Kit | 90/91 | Q24 - 36 7/8" | 3" | Q24 - 36 3/8" | 30" |
| Q45 | 90/96 | Q31 - 42 1/2" | 5" | Q32 - 41 3/8" | 36" |
