Heavy Duty or progressive coil springs

Depends on your normal driving etc..

I have an 80 series which is a heavier car and had the progressive rate King Springs in the rear...

I also had poly airs in there as I could then take a bigger load without the arse sagging down .. and yes even with the progressive rate springs the butt will sag!

With the poly airs if you are not using them they have to have a minimum of 5psi in them as to do the instal the stop bumps are removed etc... what this did was to lift the rear up slightly putting the spring in a position where it would be sitting if the weight of the car was lighter.... so the spring was softer!!!

I had a big car with a fridge in the back that wallowed like a bastard!!! couldn't wait to get the prick things out and put the heavy duty ones in...

Now I have the heavy duty springs in the rear and don't notice any loss in articulation and have a much better ride!

My vote is NOT for the progressive rate springs!

But like I said that was for my set up and it is a bit different to yours..

Cheers

I used to have a 91 4Runner and would go the Progressive springs. The HD is good if you have a lot of weight in the back but not for wheel travel. Also fit some longer shocks Rancho RS5208 shocks are 2'' + longer and give you LOTS more wheel travel.