Fourth Generation Suspension FAQ
By: Jason Swindle
Spring Rates
Spring |
Front
(lb/in) |
Rear
(lb/in) |
Ride
Hight (in) |
| V6 | 223 | 95.4 | N/A |
| Z28 (93 - 97) | 292 | 114 | N/A |
| Z28 (98+) | 291 | 114 | N/A |
| 1LE (94+) / WS6 / 99+ Base SS | 360 | 130 - 180 | +0.5 |
| SLP Level II "gray" (Eibach) / y2y SS | 300 - 450 | 115 - 185 | -0.75 |
| SLP Race/Aimes "red" (Eibach) | 337 - 674 | 83.4 - 138.2 | -2 |
| Eibach Pro (93 - 97) | 377 - 600 | 94 - 160 | -1.5 |
| Eibach Pro (98+) | 377 - 600 |
94 - 160 |
-1.25 |
| Eibach Sportline | 360 | 80-137 | -2 |
| Hotchkis | 285 - 525 | 100 - 140 | ? |
| Edelbrock | 585 | 120 - 150 | ? |
| Suspension Techniques | 600 | 140-160 (?) | ? |
Shock Rates
| Shock | Bump | Rebound |
| Bilstein B46-1913 front | 159 | 279 |
| Bilstein/SLP B46-2071 front | 130 | 397 |
| Bilstein B46 - 1914 rear | 86 | 174 |
Anti-Roll Bars
| Bar | Front (mm) | Rear (mm) |
| Z28 (93+) | 30 hollow | 19 hollow |
| Z28 (93 1LE) | 32 hollow | 21 hollow |
| Z28 (94+ 1LE, 96+SS, WS6) | 32 hollow | 19 hollow |
| Z28 (3rd gen) | N/A |
24 hollow |
| LG Motorsports | 32.5 hollow |
21.5 solid |
| Addco | 32 solid | 21 solid |
| Addco (alternate) | N/A | 26.5 solid |
| Addco (3rd Gen) | N/A | 19 solid |
| Suspension Techniques | 35 solid | 25 solid |
| Herb Adams (short) | 32 solid | N/A |
Alignment
| Camber (deg) | Caster (deg) | Toe (deg) | |
| factory | +1(± .5) | +3(± .5) | 0.15(± .5) |
| autox/street | -0.5 | +4.0 | 0.0 |
| autox* | -1.5 | +4.5 | 1/16 inch toe out |
* Autox setting listed
only possible with front end lowered approximately 1.5" from stock