Noob to the forum. So forgive me if this question has been answered a million times already. I searched, I promised, but most everything is mostly related to lifts.

I have a 2001 4runner SR5 4x4. Glacier Metallic. 80K. I absolutely love our truck but its my wife's daily driver and therefor I need to keep it fairly stock.

Here is my issue. We pull a camp trailer as well as a small boat all summer. When pulling the boat the ass-ended is sagging pretty bad and almost bottoming out and it rides pretty poorly

I'm not really looking to have it lifted, I just want to get the rear leveled with the front and firmed up to properly pulled our toys. I just scored a great deal on a full set of Bilsteins and was wonder what the best option for replacement rear springs is.

Reading through all the posts on suspension is a little overwelming. So again just looking for solution to leveling the rear and adding more towing capability.

Thanks in advance.
-Ben

Firestone Air Bag Suspension - Ride Rite, Sport Rite & Coil Rite Air Springs - Videos, Installations & Reviews

stock springs or maybe OME 906 with these could be something to consider

Airbags will give you the carrying capacity that you need, when you need it, nothing when you don't.

The Old Man Emu (OME) 906 will give you ~2" of lift on a 2001 but are a higher spring rate (906 are a 220# spring rate and the stock coils are ~160#)

Replacing with new stock coils will still compress under load.

You will find the big rubber cones (Jounce bumpers) inside the coils. These are there to carry and control heavy loads without stiffer coils for light loads.