2007-2013 SILVERADO/SIERRA 1500 2WD/4WD 4″/6″ LOWERING KIT (COILS/SPINDLES, EXT/CREW CAB) (CAST STEEL ARMS)

Max Trac K331346-8 – 4”/6” Complete Lowering Kit
For 2007–2013 Silverado/Sierra 1500 2WD/4WD (Extended Cab / Crew Cab) Cast Steel Arms

Transform the stance of your GMC 1500 with the MaxTrac K331346-8, a complete 4” front and 6” rear lowering kit engineered for aggressive styling without compromising ride quality. Designed specifically for 2007–2013 Silverado/Sierra 2WD and 4WD trucks (Extended Cab and Crew Cab models with Cast Steel Arms), this bolt-on kit delivers a factory-like ride with improved handling and a leveled, street-ready look.

Front Suspension

The front drop is achieved using Max Trac’s Signature Series 2” lowering spindles paired with 2” linear-rate coil springs.

• 101320 – Spindles are cast from high-strength ductile steel, E-coated for corrosion resistance, and designed to relocate the hub assembly a true 2” upward, maintaining proper alignment, geometry, and fitment.
• 251320-8 Coil Springs feature a firmer-than-stock spring rate for enhanced control and powder coated for long-lasting durability.

Rear Suspension

The rear receives a 6” drop using 201360 flip kit combined with fabricated lift hangers.

This setup retains factory leaf springs for a stock-like ride, while the included Max Trac shocks offer firmer valving to improve handling.

The adjustable-height rear hangers allow for ride height fine-tuning to get the perfect stance.

Some cutting is required: factory leaf spring hangers, brake line brackets, and bump stop mounts must be removed.

Features

• Signature Series ductile iron lowering spindles (durable, OE-style geometry and fit)
• Powder-coated linear-rate coil springs (firmer than stock for improved control)
• Adjustable height rear flip kit with fabricated brackets and lift hangers
• MaxTrac performance-tuned rear shocks (enhanced handling and stability)
• Fully powder-coated components for corrosion resistance and clean appearance
• Bolt-on installation with standard tools (requires cutting/removal of factory components)

Benefits

• Levels out factory rake for a more aggressive, balanced stance
• Improves handling and control without sacrificing ride comfort
• Adjustable rear ride height allows precise stance tuning
• Retains factory leaf springs for smoother ride quality
• Fabricated and coated components ensure long-term durability

Additional Notes

• Optional C-notch frame support available: Part #301360C
• Requires additional hardware for MagneRide-equipped models: Part# 9917MR
• Fender trimming may be required depending on wheel and tire size