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These leaf springs are made to meet or exceed OEM specifications and standards. These springs are made to replace the OEM leaf springs. Replacing broken or worn leaf springs keeps your truck safe for you and everyone you share the road with. Please call us toll free (1-877-774-6473) if you need assistance identifying your spring.
Had a 77 K20 with 3 leaf and a plow, front end was too soft with plow attached. Installed these and truck lifted up 3 inches in front and the ride is firm with plow now. A little stiff without plow, but have well aged shocks that could aid in that aspect. If you are ordering rear shackles at the same time, do not buy the bushings they state are required or you will have a spare set... I torqued my U-bolts to 150#, was hard to find that spec in any book.
they are a great spring strong ,easy to instal,and the price is good
