EDIT: I actually need to replace my 4" shackle flip brackets with 2.5" brackets. So I'm also selling the ORD 4" shackle flip as well. -My truck has a "rake" to it now, with a 4" shackle flip and 6" long shackles instead of the standard 4" ones. If you aren't running high-arched lift springs like I am, this combo will work just fine for you. I needed to run the 6" shackles. ORD told me from the beginning and I didn't listen.... 
With my 6" lift 56s, the standard 4" shackle wasn't long enough to accommodate the compressed length of my main leaf. -I was getting shackle inversion. So I've since then gone to a 6" shackle. More specs on the shackles here:
http://diy4x.com/cart/index.php?route=product/product&path=24&product_id=113
Super rugged compared to stock. Here's the "shackle inversion" or "spring lock-out" that I was getting with 4" shackles.
With my 6" lift 56s, the standard 4" shackle wasn't long enough to accommodate the compressed length of my main leaf. -I was getting shackle inversion. So I've since then gone to a 6" shackle. More specs on the shackles here:
http://diy4x.com/cart/index.php?route=product/product&path=24&product_id=113
Super rugged compared to stock. Here's the "shackle inversion" or "spring lock-out" that I was getting with 4" shackles.
- ORD 4" Shackle Flip brackets (73-87 1/2 ton): $189 New. Asking $100 plus the ride.
- DIY4X shackles: $91.35 New. Asking $50 plus the ride.
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