TRZ Motorsports Anti-Roll Bar - 5" Arms - Under Housing Mount - Builders Kit - Unwelded - 203-UW5-UHM
Standard HD Under-Housing Anti-Roll Bar Builder's Kit
The TRZ Motorsports 203-UW5-UHM Anti-Roll Bar Kit is a heavy-duty, unwelded standard HD drag racing ARB system engineered specifically for under-housing mounting applications. Designed for racers who need stable, repeatable launches without the bulk of a twin-tube / Girth Brooks setup, this builder's kit gives fabricators maximum flexibility while maintaining TRZ's proven anti-roll geometry.
This unwelded HD package includes the complete ARB link kit - (2) 1" chrome-moly tubes, LH/RH rod ends and tube inserts, (4) housing tabs, and Grade 8 hardware. The primary anti-roll bar uses a strong and lightweight 1-5/8" chrome-moly main tube, ideal for most high-performance drag racing platforms.
The kit supports up to 25" center-to-center ARB spacing, with the ability to shorten as needed to match your rear housing or chassis layout. You may choose 5" or 6" CNC-machined billet one-piece arms, measured from the ARB tube centerline to the rod-end centerline.
Mounting brackets are included for under-housing installation, making this version perfect for cars that require a low, stable ARB mounting point. Note: Twin Tube / Girth Brooks kits are not compatible with under-housing mounts due to their larger diameter.
Each kit also features billet aluminum end caps with bronze bushings and grease fittings for smooth, long-lasting performance (bronze ID may require minor sanding after arm welding). When installed correctly, the ARB eliminates body roll, improving launch consistency, traction, and weight transfer efficiency.
Performance Highlights
- Under-housing mounted standard HD anti-roll bar for drag racing
- 1-5/8" chrome-moly main tube for strong torsional control
- Unwelded builder's kit for total fabrication flexibility
- Includes 1" chrome-moly link tubes, rod ends, and Grade 8 hardware
- Up to 25" center-to-center ARB width (shortenable)
- Choose 5" or 6" billet CNC-machined ARB arms
- Includes housing-mounted brackets for low-profile installation
- Billet end caps with bronze bushings and grease fittings
- Eliminates body roll for straight, predictable launches
Quick Specs
- Kit Type: Standard HD Anti-Roll Bar (Under-Housing Builder's Kit)
- Main Tube: 1-5/8" chrome-moly
- Link Tubes: (2) 1" chrome-moly tubes w/ LH & RH rod ends
- Max Width: 25" center-to-center (adjustable/shortenable)
- Arms: 5" or 6" billet CNC one-piece arms
- Mount Style: Under-housing installation
- End Caps: Billet aluminum w/ bronze bushings
- Part Number: 203-UW5-UHM
Frequently Asked Questions
Why choose an under-housing anti-roll bar?
An under-housing mount lowers the ARB's leverage point, improving stability and keeping the rear suspension predictable during hard launches.
Is this kit compatible with the twin-tube / Girth Brooks design?
No. Twin-tube ARB setups are too large to clear the housing and are not offered for under-housing installations.
Why Buy from Beefcake Racing?
Beefcake Racing provides verified TRZ Motorsports products, expert setup guidance, and fast shipping. For technical support or ordering help, contact sales@beefcakeracing.com or call 1-855-827-7223.
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