TRZ Motorsports Tubular Front Control Arms - Stock Spring Lowers Only (1971 - 1976 Impala / Caprice B-Body) - 321-STK-Lowers
Stock-Spring Lower Control Arms for 1971 - 1976 Impala & Caprice
The TRZ Motorsports 321-STK-Lowers are high-strength tubular lower control arms engineered specifically for 1971 - 1976 Chevrolet Impala and Caprice B-Body vehicles. Built from TIG-welded chrome-moly tubing, these lowers deliver major weight savings, improved rigidity, and race-ready suspension geometry for drag racing applications.
These stock-spring-style lowers are designed to work with factory-type coil springs and shocks, and feature dropped spring perches to accommodate taller aftermarket spring options. Depending on the coil spring used, the front end may naturally lower 1.5" to 1.75" versus the stock ride height.
While these lowers are fully compatible with TRZ's PRO Series uppers, the 6 - 7 degrees of positive caster that racers target can only be achieved when both upper and lower control arms are installed as a matched system. Uppers or lowers alone cannot deliver the full caster correction.
Important: TRZ A-arms are intended for drag racing only. They do not include sway bar tabs and are not designed for street use.
Performance Highlights
- TIG-welded chrome-moly tubing for durability and strength
- Dropped spring perches support tall aftermarket coils
- 1.5" - 1.75" ride height drop depending on spring choice
- Up to 15 lbs per side weight reduction when used in full kit
- Pairs with TRZ PRO uppers to achieve 6 - 7° caster
- Designed for drag racing and aggressive weight transfer
Quick Specs
- Application: 1971 - 1976 Impala & Caprice (B-Body)
- Position: Stock-spring lower control arms only
- Material: TIG-welded chrome-moly
- Ride Height Drop: 1.5" - 1.75" depending on coils
- Compatibility: Factory-type springs & shocks
- Caster Capability: 6 - 7° with full TRZ kit
- Part Number: 321-STK-Lowers
- Use Case: Drag racing only (no sway bar tabs)
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 lowers work with coilover shocks?
No. These are stock-spring-only lower control arms. For coilovers, use TRZ's coilover lowers or a 316/319-style configuration.
Do the lowers by themselves provide the 6 - 7° caster improvement?
No. The full matched upper + lower kit is required to reach the intended caster range.
Why Buy from Beefcake Racing?
Beefcake Racing is your leading source for TRZ Motorsports drag suspension components. We provide expert tech support, verified fitment assistance, and fast nationwide shipping. For help choosing the right setup for your Impala or Caprice, contact us at sales@beefcakeracing.com or call 1-855-827-7223.
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