BST BSSP Front Upper Control Arms 1999–2006 Silverado/Sierra 1500 6‑Lug Pair — 2–4" Lift, Chromoly Ball Joints & PU Bushings

BST BSSP front upper control arms are a bolt-on, heavy-duty 2–4" lift tubular ball joint kit engineered to replace OEM arms on 1999–2006 Silverado and Sierra 1500 trucks with 6‑lug wheels.

This pair of front upper control arms is built for lifted Chevrolet/GMC 1500 trucks that need stronger, longer-lasting steering and suspension components. Constructed with alpha chromoly ball joints, CNC-machined bushings and housings, and PU pivot bushings, the kit is supplied complete with hardware and arrives ready for installation. These arms are designed for both 4WD and RWD applications on 6-lug hubs and require a post-installation alignment to ensure correct suspension geometry.

How do these control arms improve ride and durability?

The BST BSSP arms use higher-strength materials and refined bushings to reduce deflection and extend service life compared with factory control arms. The whole PU bushings resist deterioration from oil and road contaminants better than rubber. A tower-style dust cover protects the joint in extreme temperatures and rough environments.

• Alpha chromoly ball joints with built-in taper for secure fitment
• Full polyurethane pivot bushings for improved responsiveness
• Tower-type dust covers for longer joint life
• CNC-machined components and precision welding for strength

What does installation involve and what’s included?

The kit is 100% bolt-on and comes as a matched pair with all necessary hardware shown in the product photos, simplifying swap-out of worn or damaged OEM arms. Ball joints and bushings are pre-installed on the control arms; however, avoid using excessive force on the copper zerk fittings during maintenance. Alignment is required after installation to restore proper steering and tire wear.

• Included: left and right upper control arms and installation hardware
• Pre-installed ball joints and bushings for faster assembly
• Requires wheel alignment after installation
• Do not overtighten grease fittings to prevent damage

Which vehicles and lift heights are supported?

These tubular upper control arms are specifically designed for 1999–2006 Chevrolet Silverado 1500 and GMC Sierra 1500 trucks that use 6-lug wheels. They accommodate lift heights from 2 to 4 inches and are compatible with both four-wheel-drive and rear-wheel-drive models when fitted to the front upper position.

• Vehicle fit: 1999–2006 Silverado/Sierra 1500 with 6-lug wheels
• Lift range: 2 – 4 inches
• Front placement: upper control arm, left and right included
• Suitable for 4WD and RWD front applications

What maintenance or replacement parts should I consider?

The control arms ship with durable components, but normal service items like replacement ball joints and bushings are available from the same brand if needed. Routine inspections for play, damaged dust covers, or leaking joints will catch wear early; replace parts as soon as noticeable performance changes occur.

• Aftermarket ball joints and bushings available from BST BSSP store
• Inspect dust covers and pivot bushings periodically
• Address unusual steering or tire wear promptly
• Use correct torque specs and avoid overforcing grease zerks

Who is this for: This control arm kit is intended for truck owners upgrading to a modest 2–4" lift who need a stronger, maintenance-friendly front suspension option for their 1999–2006 Silverado or Sierra 1500 with 6-lug wheels. It’s a practical choice for daily drivers, light off-road use, and anyone replacing fatigued OEM arms with a bolt-on performance upgrade.