| Lexus | 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) |
| ES300 | 92/96 | Q11 - 40 1/4" | 4" | Q11 + 39 5/8" | 24" |
| ES300 w/ Q Strech Kit | 92/96 | Q11 - 40 1/4 | 4" | Q11 - 39 5/8" | 30" |
| GS300 | 93/96 | Q14 - 38 1/4" | 5" | Q14 - 38 5/8" | 36" |
| LS400 | 90/94 | Q19 - 39 3/4" | 6" | Q19 - 38 1/4" | 32" |
| SC300/ SC400 | 92/96 | Q14 - 37 1/4" | 4" | Q14 - 36 1/8" | 16" |
| SC300/ SC400 w/ Q Strech Kit | 92/96 | Q14 - 37 1/4" | 4" | Q14 - 36 1/8" | 30" |
