I lowered my Vette some time ago and was going to raise it back up a little. What is the factory height of a 2005 C6? What do you measure off of? The top of the lowering bolts or distance from leave spring to control arm??
The Z trim height is the front ride height. The D trim height is the rear of the vehicle. The appearance of the height that you see when you look at the car is actually a tolerance stack up of the suspension components, weight of the vehicle and the variations in the adjustment from the factory. As you see below the table shows the specified nominal height and the allowable variation. The car should be at 1.81 inches but can be as low as 1.52 and as high as 2.06 and still be in specification. The trim height is measured per the following illustration (front drawing attached, rear is similar.)
Trim Height Specifications
RPO Service Preferred Tolerance
Metric English
Z Trim Height
FE1(Base) 46 mm (1.81 in) 39.6-52.4 mm 1.52-2.06 in
FE2 (F55) 46 mm (1.81 in) 39.6-52.4 mm 1.52-2.06 in
FE3 (Z51) 45 mm (1.77 in) 38.6-51.4 mm 1.52-2.02 in
D Trim Height
FE1 122 mm (4.80 in) 115.6-128.4 mm 4.55-5.05 in
FE2 122 mm (4.80 in) 115.6-128.4 mm 4.55-5.05 in
FE3 121 mm (4.76 in) 114.6-127.4 mm 4.51-5.01 in
Based on where the trim height is measured and when you consider the allowable tolerance in each of the components that are north of that measurement point, a lot of variation (perceived height) can be realized. There is no way to measure the fender or the arms to obtain a "stock" height.
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