Fits: 2001 thru 2010 Chevy Silverado/ GMC Sierra 2500HD LB7/LLY/LBZ/LMM Duramax Diesel

Deavers 4" Progressive Series springs are high quality 9-leaf and 10-leaf units fabricated with high grade 5160 "American Made" steel. A higher leaf count spring allows the use of thinner leaf material that yields a more flexible progressive leaf stack, or pyramid, producing a much smoother spring rate curve throughout the complete suspension cycle. The even, linear compression rate curve of our Progressive System spring is the primary key to excellent ride quality. This is a complete replacement for the OEM spring and is arched 4" over the factory rear lift height, comparable to a 4" block.

Other design features include diamond cut inner leaf ends minimizing shear points, anti-friction pads inserted between the leaf's for a smoother ride and quiet operation, full military-wrapped spring eyes for superior durability, and OEM bushings. Combined with properly valved high performance shock absorbers, the ride is enhanced beyond belief. Bushings are included with leaf springs.

Features:

• Excellent ride quality
• Military wrap
• Diamond cut ends and friction inserts
• Made in the USA

Includes:

• 2 x Deaver 4" Progressive leaf Springs

Notes:

• Progressive springs will reduce payload and are NOT recommended for towing applications
• Sold as a Pair
• Fixed over weight shipping charge is for the lower 48 States, shipping rates may change depending on your location, we will contact you if thats the case.
• Deaver Springs are a special order item and have a 40+ business day lead time