General Motors HiPer Strut Technology
HiPer Strut, short for high-performance strut, is a General Motors suspension technology that improves ride, handling, and steering in front-wheel-drive vehicles by uniquely enhancing the traditional MacPherson front suspension design.
What It Does
HiPer Strut utilizes premium, technologically advanced engineering to improve ride, handling, and steering in the front-wheel drive vehicles. Specifically, the technology delivers the following benefits:
- Reduces torque steer
- Boosts vehicle response to tire variation and imbalanced wheels
- Provides more linear steering
- Enhances driver communication
- Improves isolating impact from bumps and rough surfaces
How It Works
HiPer Strut is based on the MacPherson strut front suspension and utilizes dual-path top mountings, separating the transfer of damper and spring loads from the body. The steering knuckle/strut carrier is combined and unique to this improved design, while the suspension uses a rigid sub-frame that attaches to the lower control arms. The sub-frame is bolted to the body with four isolators that reduce the transmission of noise and vibration to the vehicle body.
In effect, this design enables a limited-slip differential that provides superior grip, traction, and ride quality, especially when combined with larger diameter wheels, such as those 19 inches or larger.
GM describes the significance of the system as “what you don’t feel”: the absence of torque steer and sharp reactions to bumps and potholes — characteristics typically associated with front-wheel-drive vehicles — is important in providing a more linear and controlled driving experience.
Vehicles With HiPer Strut
HiPer Strut is available on the following vehicles:
- Buick LaCrosse: second- and third-generation models
- Buick Regal: fifth-generation model
- Opel Insignia/Vauxhall Insignia: first-generation models