TRZ Motorsports Tubular Front Control Arms - Uppers Only (1971 - 1976 Impala / Caprice B-Body) - 321-PRO-UPPERS
PRO Series Upper Control Arms for 1971 - 1976 GM B-Body
The TRZ Motorsports 321-PRO-UPPERS are high-strength tubular upper control arms engineered for 1971 - 1976 Chevrolet Impala and Caprice B-Body platforms. Built from TIG-welded chrome-moly tubing, these uppers deliver the rigidity, precision, and weight savings required for competitive drag racing.
Each arm features chrome-moly rod-ends attached to billet cross-shafts, giving racers a durable, tunable, and friction-free upper link. When paired with TRZ lower control arms, the complete front-end system can achieve 6 - 7 degrees of positive caster - ideal for stability during high-speed passes. Uppers or lowers used independently cannot achieve these caster values.
These arms also integrate travel limiters, allowing racers to control upward suspension travel for improved weight transfer and front-end rise at launch.
IMPORTANT: TRZ A-arms are designed exclusively for drag racing. They include no sway bar tabs and are not intended for street use.
Performance Highlights
- TIG-welded chrome-moly construction for maximum durability
- Rod-end PRO Series design with billet cross-shafts
- Part of a system capable of 6 - 7° positive caster
- Up to 15 lbs per side weight reduction with the complete kit
- Travel limiters included for optimized launch control
- Designed for 0 - 10° spindle caster range in drag race setups
Quick Specs
- Application: 1971 - 1976 Chevrolet Impala & Caprice (B-Body)
- Position: Upper control arms only
- Material: TIG-welded chrome-moly tubing
- Cross-Shafts: Billet with rod-end attachment
- Caster Capability: 6 - 7° with full TRZ kit
- Use Case: Drag racing only (no sway bar tabs)
- Part Number: 321-PRO-UPPERS
Fitment
- Chevrolet Impala
- 1971 Chevrolet Impala
- 1972 Chevrolet Impala
- 1973 Chevrolet Impala
- 1974 Chevrolet Impala
- 1975 Chevrolet Impala
- 1976 Chevrolet Impala
- Chevrolet Caprice
- 1971 Chevrolet Caprice
- 1972 Chevrolet Caprice
- 1973 Chevrolet Caprice
- 1974 Chevrolet Caprice
- 1975 Chevrolet Caprice
- 1976 Chevrolet Caprice
Frequently Asked Questions
Will these uppers achieve the full 6 - 7° caster by themselves?
No. The complete matched TRZ upper + lower control arm system is required to reach the intended caster range.
Are these upper control arms compatible with coilovers or stock springs?
Yes. The uppers are compatible with both, but the lowers determine the spring style (stock spring lowers or coilover lowers).
Why Buy from Beefcake Racing?
Beefcake Racing is your trusted source for TRZ Motorsports drag racing suspension. We provide expert setup guidance, verified fitment, and fast shipping for all B-Body builds. Contact our team at sales@beefcakeracing.com or call 1-855-827-7223 for personalized support.
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