1.5 inch lift shackles
 

I have rc full 4.5spring packs in the rear. What are the best shackles to get 1.5 inches of lift and allow for the most flex. Does anyone have before and after shackle flex pictures

A 1.5 inch shackle is a 1.5 inch shackle. They will all flex the same. Only difference will be if your leaves are a bit longer than stock and you need a boomerang shackle to clear the shackle box.

I have 4.5rc full spring packs, and stock shackles. My shackles sit at almost 90 degrees. So should i get boomerang shackles

Regular shackles will be fine, but theres no reason not to get boomerangs either.

Okay, thanks

Your shackle angle will still be bad with th enew shackles. You should get shackle reloctors first to put your shackle at a 45degree angle. It will improve flex and ride tenfold and you will gain some lift as well. You should get those first, set your shackle at 45 and then figure out what lenght shackle to get to even out the rear with the front. I think those + a 3/4 or 1in shackle should give you about 1.5 to 2 inches. But the prformnce will be way better.

That was the original plan, but i dont want to go over 6-6.5 inches, i have 4.5 full spring packs. The relocators add 1.5-2 inches alone