My 4" lift is going on 8 years old. I'm quite happy with the ride quality but the sag over time with bumpers winches etc has taken its toll and eaten up all my uptravel.

Do I add spacers to correct?

Do I replace the springs and if so is there a 4" lift spring that will account for the extra weight?

08 rubicon unlimited 4" super lift with jk spec fox shock upgrade 35"s.

 

Replace the springs. Spacers just move the problem, you still have coils that are compressed.

Any of the multi-rate coils out these days works great. Metalcloak seems to be the most dialed in, but Rock Krawler is a good option as well.

 

You're running flat flares, or stock?

Metalcloak 3.5" coils gave closer to 5" of actual height on my relatively light jku. Way more than I expected. With the added weight you are running, they'd probably get you the 4" range you are looking for.

Oh, noticed that you're in Canada. You might give us a list of the brands you can get there without a huge upcharge.

 

Bushwhacker flats.

I have family close enough to Washington state on the border that it shouldn't matter.