TRZ Motorsports Anti-Roll Bar - Under Housing Mount - Axle Tube Mounts Included - Twin Tube (1964 - 1972 Chevelle A-Body) - 317-203-UHM-TT
Twin-Tube Under-Housing Anti-Roll Bar for 1964 - 1972 Chevelle A-Body
The TRZ Motorsports 317-203-UHM-TT Anti-Roll Bar is the ultimate under-housing ARB option for high-horsepower 1964 - 1972 Chevelle A-Body builds. Featuring the legendary Twin Tube "Girth Brooks" construction - using a 1.625" inner chrome-moly tube reinforced by a massive 2.25" outer chrome-moly tube - this setup delivers extreme torsional rigidity and chassis control under the most demanding drag racing conditions.
Designed for under-housing installation, the system includes weld-on axle tube brackets and unwelded HD ARB links that you can trim to the exact length required for your car. TRZ uses pre-determined link center-to-center distances based on A-Body geometry and mount configuration, ensuring proper motion and weight transfer characteristics. If needed, TRZ may reach out to confirm dimensions.
Each kit includes CNC-machined billet steel arms, billet end caps, full mounting hardware, and link components. This Twin Tube option is ideal for extreme-power cars, radial builds, and any application where the chassis must remain perfectly square during hard launches.
By eliminating chassis twist, this ARB ensures both tires plant evenly - crucial for lowering 60-foot times, maximizing traction, and delivering consistent, repeatable performance.
Performance Highlights
- Twin Tube "Girth Brooks" ARB with 1.625" inner + 2.25" outer chrome-moly tubes
- Under-housing mounted design with included axle tube brackets
- Unwelded HD links for custom trimmed lengths
- CNC-machined billet steel arms for extreme durability
- Pre-set link spacing optimized for Chevelle A-Body geometry
- Includes billet end caps, ARB links, and mounting hardware
- Maximum torsional rigidity for extreme horsepower builds
- Eliminates chassis twist for consistent launches and traction
Quick Specs
- Vehicle Application: 1964 - 1972 Chevrolet A-Body
- ARB Style: Twin Tube "Girth Brooks"
- Main Tubes: 1.625" inner + 2.25" outer chrome-moly
- Mount Type: Under-housing (axle tube mounts included)
- Arms: CNC-machined billet steel
- Includes: Axle tube brackets, ARB links, billet end caps, hardware
- Part Number: 317-203-UHM-TT
Fitment
- 1964 Chevrolet Chevelle
- 1965 Chevrolet Chevelle
- 1966 Chevrolet Chevelle
- 1967 Chevrolet Chevelle
- 1968 Chevrolet Chevelle
- 1969 Chevrolet Chevelle
- 1970 Chevrolet Chevelle
- 1971 Chevrolet Chevelle
- 1972 Chevrolet Chevelle
- 1964 Chevrolet Malibu
- 1965 Chevrolet Malibu
- 1966 Chevrolet Malibu
- 1967 Chevrolet Malibu
- 1968 Chevrolet Malibu
- 1969 Chevrolet Malibu
- 1970 Chevrolet Malibu
- 1971 Chevrolet Malibu
- 1972 Chevrolet Malibu
- 1964 Chevrolet El Camino
- 1965 Chevrolet El Camino
- 1966 Chevrolet El Camino
- 1967 Chevrolet El Camino
- 1968 Chevrolet El Camino
- 1969 Chevrolet El Camino
- 1970 Chevrolet El Camino
- 1971 Chevrolet El Camino
- 1972 Chevrolet El Camino
Frequently Asked Questions
Why choose the Twin Tube "Girth Brooks" ARB over the single-tube version?
The Twin Tube design offers dramatically higher torsional rigidity, making it essential for extreme horsepower and radial-style builds where keeping the chassis perfectly square is critical.
What are the advantages of an under-housing mount?
Under-housing mounts package the ARB cleanly on the rear axle, simplify installation, and maintain excellent performance without requiring a crossmember or chassis tie-in.
Why Buy from Beefcake Racing?
Beefcake Racing supplies expert drag-racing support, fast shipping, and guaranteed authentic TRZ components. For help choosing the right Chevelle A-body ARB, contact sales@beefcakeracing.com or call 1-855-827-7223.
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