BST BSSP Front Torsion Bar Mount Pair for Chevy GMC Hummer 2001-2010 — Complete OE-Style Kit with Bushings & Hardware

BST BSSP PAIR Front Torsion Bar Mounts (905-509) are a complete front-mount replacement kit that restores torsion bar attachment and alignment for compatible 2001–2010 GM and Hummer H2 trucks.

This replacement kit includes both left and right front torsion bar mounts with bushings, bolts, and nuts so you can swap both sides in one job. Manufactured to strict quality-control standards and designed to replace dealer part numbers 15044557 and 20778306, the set fits a wide range of Chevrolet Silverado, GMC Sierra, and Hummer H2 models across model years and wheelbase configurations. Use the vehicle selection tool to confirm exact fitment before purchase.

Which vehicles and model years does this torsion bar mount pair fit?

The kit fits many GM heavy-duty trucks and Hummer H2 models from the early 2000s through 2010. It supports both 2WD and 4WD configurations and is correct for crew-cab wheelbases noted in the specifications.

• Chevrolet Silverado 2500 HD: 2001–2010 (including 2500 HD Classic 2007)
• Chevrolet Silverado 3500: 2001–2006 and 2007–2010 (including 3500 HD Classic 2007)
• GMC Sierra 2500 HD: 2001–2010 (including 2500HD Classic 2007 and specific 2003 fitment)
• GMC Sierra 3500: 2001–2006 and 2007–2010 (including 3500 HD Classic 2007)
• Hummer H2: 2003–2009

What comes in the kit and how does it simplify installation?

BST BSSP supplies a ready-to-install pair of front torsion bar mounts so you won’t need to source small hardware separately. The included bushings and fasteners let you replace both left and right mounts in one service, cutting downtime and ensuring matching parts on both sides.

• (2) Front torsion bar mounts with pre-installed bushings
• (8) Mounting bolts and (8) nuts to secure each side
• Direct-replacement design for OE mounting locations and torque specs
• Replaces dealer part numbers 15044557 and 20778306 for straightforward compatibility

How does the part perform with 2WD and 4WD setups and different wheelbases?

These mounts are engineered to work with both two-wheel-drive and four-wheel-drive front suspensions and are compatible with common crew-cab wheelbases, including the 185.5" example. The geometry and bushing placements match factory mounting points to preserve alignment and torsion bar function.

• Designed for front mounts on both driver and passenger sides
• Compatible with specified 2WD and 4WD assemblies without modification
• Maintains torsion bar preload and steering geometry when installed correctly
• Follow vehicle-specific installation procedures and torque values

What should I check before ordering and during installation?

Confirm your vehicle’s exact make, model, year, trim, and wheelbase using the garage or fitment tool to avoid mismatches. During installation, inspect mating surfaces and hardware holes for corrosion or damage and replace any worn components to ensure a reliable fit.

• Verify fitment against your VIN or precise model/trim information
• Inspect original mounts, torsion bars, and crossmember for wear or damage
• Use correct torque settings and replacement hardware where necessary
• Consider professional installation if unfamiliar with front suspension work

Who is this for: The BST BSSP front torsion bar mount pair is intended for owners and technicians servicing heavy-duty Chevrolet Silverado and GMC Sierra pickups (2500/3500 series) and Hummer H2 models from the 2001–2010 range who need a full left/right front mount replacement. It’s a practical choice when OE mounts show wear, bushings are degraded, or after collision repair. Ideal for fleet maintenance, restoration projects, and owners seeking a comprehensive kit that includes the necessary fasteners for a clean, matched replacement.