Z33 SFI 25.3 Tube Chassis Roll Cage

Nissan Z33 SFI Roll Cage

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SFI 25.3 Cert — TIG Weld Only

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Our Z33 350Z roll cage and steel body chassis kit is engineered from 4130 chromoly and built for quick fitment and TIG welding. Each tube comes CNC notched and bent, ensuring tight joints and efficient installation without the need for custom fabrication.

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Key Features:

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  CNC Notched & Bent for perfect alignment

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  Laser-Etched Assembly Guides for hassle-free fitment

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  Pre-Drill Locations for TIG weld relief holes

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  Includes base plates to mount to the steel chassis (inside the bottom frame rails)

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  Built to meet NHRA / SFI regulations

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• Customized to meet specific 25.3 cert specs - Please check with your sanctioning body on regulations
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\nImportant: 4130 chromoly cannot be laser-etched on the backside of tube bends.
Etches will not be present in bend regions as they will crack during the bending process.
For these areas, you’ll need to manually align and drill TIG relief holes. All other laser markings will still guide a straightforward and accurate assembly. \n

Tubing Sizes (SFI Compliant):

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  1.625″ x .083″ — 4130 Chromoly

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  1.50″ x .065″ — 4130 Chromoly

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  1.25″ x .058″ — 4130 Chromoly

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  1.00″ x .058″ — 4130 Chromoly

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Welding & Installation:

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This kit is TIG weld-only per NHRA and SFI specifications. Designed with clear guidance for a simplified install process — even if you’re not a professional fabricator.

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What’s Included:

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  All required 4130 chromoly tubing

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  Laser-etched alignment guides (excluding bend zones)

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  Base plates for steel chassis installation

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  Tailored specifically to the Z33 350Z Nissan Chassis

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Important Notes:

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  Made-to-order product – All sales are final

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  Ships once fabrication is completed

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  Recommended for experienced builders or professional installers

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