All of the above answers are spot-on! I tried using them with super stock Springs and they worked against each other causing the rear of the car to porpoise. The car is much more manageable and consistent now and doesn't get all contorted off the starting line like it used to with the super stock Springs.

I would suggest the ET Street Pro for you to hook especially on a streetcar.

I didn't notice mine riding any rougher than with the 3,400 lb super stock Springs that were in it.

Last edited by GY3; 11/03/17 04:11 PM.

'63 Dodge 330
11.19 @ 121 mph
Pump gas, n/a, through the mufflers on street tires with 3.54's. 3,600 lbs.
10.01 @ 133mph with a 250 shot of nitrous an a splash of race gas. 1.36 60 ft. 3,700 lbs.