The QA1 Proma Star strut is an inverted monotube strut for 1979-1993 Mustang that suits both street driving and track use. Its large diameter shaft resists side loading for smooth, consistent performance under hard cornering and braking, while the lightweight threaded aluminum body reduces unsprung weight for better suspension response. Single-adjustable rebound is set with an 18 position knob at the top of the strut tower.
Specifications:
- Type: Proma Star inverted strut (one strut only)
- Valving: Single-adjustable, 18 position rebound
- Body: Threaded aluminum
- Fitment: Wide and narrow spindle Fox Body applications
- Caster camber plates: Required and sold separately (CC110 for 1979-1989, CC112 for 1990-1993)
- Coil-over conversion: Kit COK113 available separately
- Made in: USA (Lakeville, Minnesota)
- Part number: HS01
Vehicle Applications:
- 1979 Ford Mustang
- 1980 Ford Mustang
- 1981 Ford Mustang
- 1982 Ford Mustang
- 1983 Ford Mustang
- 1984 Ford Mustang
- 1985 Ford Mustang
- 1986 Ford Mustang
- 1987 Ford Mustang
- 1988 Ford Mustang
- 1989 Ford Mustang
- 1990 Ford Mustang
- 1991 Ford Mustang
- 1992 Ford Mustang
- 1993 Ford Mustang
FAQ
Does the HS01 include a spring or caster camber plate?
No. The HS01 is one individual Proma Star strut only. QA1 caster camber plates are required and sold separately, CC110 for 1979-1989 and CC112 for 1990-1993.
Is the strut adjustable?
Yes. It is single-adjustable with an 18 position rebound knob at the top of the strut tower.
What vehicles does the HS01 fit?
It fits 1979-1993 Ford Mustang, including wide and narrow spindle Fox Body applications.
Can the HS01 be run as a coil-over?
A coil-over conversion kit is available separately as COK113.

