Originally Posted By 65Fury440
I need a set of springs for my car.
It weighs 3800 lbs. I have a 600ish hp motor, 4 speed, and am putting a Dana in it, figured now is as good a time as any to upgrade my springs.
It is a street car with a few times a year to the strip.

I was going to go with these XHD
http://www.manciniracing.com/moxbbosetlri.html

After reading this thread, I am considering Calvert split monos
http://www.manciniracing.com/camolespset1.html

It concerns me they are a one size fits all though. Any thoughts how it would handle a car at the heavier end of the field?


My experience with the quality MP springs De Mexico.

Round 1 was brand new MP XHD springs. It might be correct OEM ride height but to me the rear of the car was waaay too low.
Didn't even drive the car, removed the springs and returned them to my local Summit Racing.



Round 2 was MP's Super Stock springs.
Per suggestions I went with 2 driver's side SS springs from an A body for softer ride and lower ride height.
I was very happy with initial results but 2 years later with very low miles the springs have flattened and sagged about 2" to the point the rear shacklers are tilting towards the rear of the car.
The final straw was after doing some spirited driving and power shifts with the 440 4 speed the rear spring segments decided to open up and introduce themselves to my rear valance, both sides! From the best I can determine the flattening of the springs has shifted the rear section of them too close to the rear valance.

Round 3 will not include any springs from MP down




Last edited by KillerBee; 01/17/17 11:17 PM.