2.5 Inch Block & U-bolt Kit | Chevy/gmc 1500 (99-25)

Built for Chevy and GMC 1500 owners who want to reclaim their truck's ride height — this 2.5-inch block and u-bolt kit restores sagging rear suspension and handles up to 33–34-inch tires. Tapered blocks reduce driveshaft angle for cleaner geometry, while heavy-duty u-bolts provide the clamping force you need for a simple, reliable install.

Installed and serviced at Road Runner Wheels & Tires. Most suspension upgrades go in the same day. Call (678) 400-6467 to schedule.

What's included

• Rear blocks (qty. 2) — Tapered design reduces driveline angle and provides a stronger, longer-lasting alternative to cast blocks. Single 9/16-inch pin fits snugly into factory axle pads.
• U-bolts — E-coated steel, 9/16-inch thread size, 10.5-inch inside length, square style. Four inches of thread engagement ensures secure fastening and corrosion resistance.

Important notes

• Does not fit models equipped with composite leaf springs.

Why customers pick this at Road Runner

• Tapered block geometry preserves driveline angles — no binding or premature wear.
• Heavy-duty steel construction outlasts factory cast blocks by years.
• Rough Country Satisfaction Guarantee — backed locally at Road Runner.
• Professional install takes 2–3 hours and includes alignment check to ensure your truck tracks true.

Ready to build it? Call (678) 400-6467. Hablamos Español.