The QA1 52721 street performance lower control arm kit is a bolt-in front suspension upgrade for 1971-1976 GM B-body cars. It is designed for use with QA1 Ultimate ball joints and low-friction bushings, corrects outdated front end geometry and offers an optimized strength-to-weight ratio. The kit is made in the USA.
Specifications:
- Type: street performance lower control arm kit
- Designed for use with QA1 Ultimate ball joints
- Bushings: low friction
- Geometry: corrects outdated front end geometry
- Install: easy bolt-in
- Made in the USA
- Part number: 52721
Vehicle Applications:
- 1971 Chevrolet Caprice
- 1972 Chevrolet Caprice
- 1973 Chevrolet Caprice
- 1974 Chevrolet Caprice
- 1975 Chevrolet Caprice
- 1976 Chevrolet Caprice
- 1971 Chevrolet Impala
- 1972 Chevrolet Impala
- 1973 Chevrolet Impala
- 1974 Chevrolet Impala
- 1975 Chevrolet Impala
- 1976 Chevrolet Impala
FAQ
What is the QA1 52721 kit?
It is a bolt-in street performance lower control arm kit that corrects front end geometry on 1971-1976 GM B-body cars.
What ball joints is it designed for?
It is designed for use with QA1 Ultimate ball joints.
Is it a bolt-in installation?
Yes. It is an easy bolt-in installation.
What vehicles does it fit?
It fits 1971-1976 GM B-body cars, the Chevrolet Caprice and Impala.

