JustA5.0

Is there any difference between raptor rear leaf springs and a fx4 leaf springs. Also will raptor rear shocks fit a f150 with a 3in block.*

Thanks for the help

Skyline

raptor leaf springs are different, rear shocks will fit the f150, but typically they come with a 2.5" block

Z7What

The rear spring is different but will fit, the FX4 block is 1.25", the Raptor is 3". Yes the shock will fit with the Raptor springs and blocks installed.

The fronts coilovers i believe will not due to the upper mount being different. This I'm not 100% sure of but the rear I am.

Wayne

JustA5.0

What's the difference with the leaf springs? Are they stiffer?

Z7What

Pretty sure there softer to get more travel, the Raptor also has less payload too which makes me again believe they are softer.

Wayne

JustA5.0

O okay. Thanks for the info!

Skyline

this is a measurement of the raptor rear block i have waiting in my garage along with the rest of the shocks and leafs off of a raptor.

it is in fact a 2.5 block, im not sure if it will make a difference in your setup, other than making the rear end higher.




the reason that the front coilovers don't fit is because they are too long, they mount up, but you would need raptor upper control arms, raptor lower control arms, lengthened cv axles, brake lines, etc to get the front end to work, and then they would stick out another few inches each side to which new fenders would be needed, its a large process.

The raptor leafs are softer and more progressive, less payload indeed

Z7What

Good to know, always thought they were 3"! After I do my front Fox Coilovers may need to go with the Raptor blocks to level off.

Wayne

JustA5.0

Okay. I have 4 in fabtech lift. I was just mostly seeing if the raptor rear shocks will be long enough to install on my truck.

Z7What

Will you be using the Raptor springs? If not, your factory springs won't travel as much and the Raptor shocks might work. Why I would do is measure from center of upper mount hole to center of lower shock mount hole. Then find out the fully compressed and fully extended lengths on the Raptor shocks and I'll do the math!

Wayne