TRZ Motorsports Anti-Roll Bar - Under Housing Mount - Axle Tube Mounts Included - Twin Tube (1971 - 1976 Impala / Caprice - B-Body) - 321-203-UHM-TT
Twin-Tube Under-Housing Anti-Roll Bar for 1971 - 1976 Impala & Caprice (B-Body)
The TRZ Motorsports 321-203-UHM-TT Anti-Roll Bar is the extreme-duty Twin Tube "Girth Brooks" version engineered for the 1971 - 1976 Impala and Caprice B-body platform. Built for serious drag racers, this ARB delivers maximum chassis control, eliminates body twist, and ensures even rear tire loading for harder, straighter, and more consistent launches.
This under-housing system mounts directly to the axle tubes using the included weld-on brackets. The Twin Tube construction uses a 1.625" chrome-moly inner tube supported by a 2.25" chrome-moly outer tube, creating one of the strongest ARB designs available for heavy, high-horsepower vehicles.
CNC-machined billet steel arms and billet end caps provide durability and precise motion. TRZ uses pre-set link spacing based on B-body geometry and may contact you to confirm measurements for proper setup. The kit includes HD unwelded ARB links that can be trimmed to the exact length needed for your configuration.
If you're launching a heavy Impala or Caprice with big power, the Twin Tube ARB gives you the torsional strength needed to maintain chassis balance and put every bit of power to the ground.
Performance Highlights
- Twin Tube "Girth Brooks" design for extreme torsional rigidity
- 1.625" inner + 2.25" outer chrome-moly tubes
- Under-housing mounted with weld-on axle tube brackets
- CNC-machined billet steel arms for maximum strength
- Pre-set link spacing designed for B-body geometry
- Unwelded HD links for custom trimming
- Includes billet end caps and complete mounting hardware
- Eliminates chassis twist for consistent, stable launches
Quick Specs
- Vehicle Application: 1971 - 1976 Chevrolet Impala / Caprice
- ARB Style: Twin Tube "Girth Brooks"
- Main Tubes: 1.625" inner + 2.25" outer chrome-moly
- Mount Type: Under-housing with axle tube mounts included
- Arms: CNC-machined billet steel
- Includes: Axle brackets, ARB links, billet end caps, hardware
- Part Number: 321-203-UHM-TT
Fitment
- 1971 Chevrolet Impala
- 1972 Chevrolet Impala
- 1973 Chevrolet Impala
- 1974 Chevrolet Impala
- 1975 Chevrolet Impala
- 1976 Chevrolet Impala
- 1971 Chevrolet Caprice
- 1972 Chevrolet Caprice
- 1973 Chevrolet Caprice
- 1974 Chevrolet Caprice
- 1975 Chevrolet Caprice
- 1976 Chevrolet Caprice
Frequently Asked Questions
Who benefits most from the Twin Tube ARB?
High-horsepower B-body drag racers who need maximum torsional strength and consistent traction.
Why mount the ARB under the housing?
It provides clean packaging, keeps the bar low, and delivers excellent suspension control without requiring a crossmember.
Why Buy from Beefcake Racing?
Beefcake Racing offers expert support, verified TRZ suspension components, and fast shipping. For help choosing the best B-body ARB setup, contact sales@beefcakeracing.com or call 1-855-827-7223.
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