R35 SFI Tube Chassis Roll Cage

Nissan R35 GT-R SFI Roll Cage / Chassis Kit (4130 Chromoly)

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SFI 25.3 Certified — TIG Weld Only

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Our Nissan R35 GT-R roll cage and chassis kit is precision-crafted from 4130 chromoly and designed for quick fitment and welding. All tubing is CNC notched and bent, ensuring tight, consistent joints and a faster install process.

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Key Features:

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  CNC Notched & Bent for exact fitment

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  Laser-Etched Alignment Marks for precise tube placement

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  Pre-Drill Guides 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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  Designed to meet NHRA / SFI regulations

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   Built to comply with SFI 25.3 requirements

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\nNote: Due to the properties of 4130 chromoly, laser etching cannot be applied to the backside of bends.
Etch marks will not be placed within bend areas, as they will crack during bending.
For these sections, you’ll need to take extra care in placing TIG relief holes and aligning those tubes. The rest of the etched guides will help ensure an accurate overall fit. \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 as per NHRA and SFI specs. It is built to make the installation process as straightforward as possible, even for those without custom fabrication experience.

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What's Included:

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  All required chromoly tubing

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  Laser-etched fitment guides (excluding bend areas)

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  Base plates for frame-rail mounting

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  Designed specifically for the Nissan R35 GT-R 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 complete

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  Designed for use by professional installers or experienced builders

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