Race Car Chassis Roll Cage Kits and Pre-Bent Chromoly Tubing
Make your fabricating job easier with our pre-bent tubing and custom tube bending service
Race Car Chassis Roll Cage Kits and Pre-Bent Chromoly Tubing
4130N Chromoly Roll Cage Kits & Pre-Bent Tubing — Leave the Bending to Us
Whether you’re building a new race car from scratch or updating your current chassis, The Chassis Shop carries Pro-Werks pre-bent 4130N chromoly cage kits and individual tubing components — precision bent and ready to weld. Perfect for the professional chassis builder and the serious do-it-yourselfer. Standard kits fit most installations; custom kits are available built to your exact specifications.
6 Point Pre-Bent Chromoly Cage Kits — Standard Packages
Order everything you need with a single part number. Each kit includes a matched set of pre-bent front hoop, intermediate hoop — available in three tube diameter sizes to match your build requirements.
- 6 Point Cage Kit — 1-1/8", 1-1/2", or 1-5/8" Tube Diameter — Pro-Werks 6 Point Pre-Bent Chromoly Cage Kit, 4130N — front hoop, intermediate hoop, back bars, seat form bars & shoulder hoop
Individual Pre-Bent Chromoly Cage Components — Hoops, Bars & Kits
Build your cage your way with individual pre-bent components. All pieces are 4130N normalized chromoly, precision bent to consistent radii and angles. Available in 1-1/8", 1-1/2", and 1-5/8" tube diameters with 0.083" wall thickness.
- Front & Intermediate Hoops — Double Bend, 5-1/2" to 7" Bend Radius — Pro-Werks 6 Point Pre-Bent Chromoly Hoop, 4130N — 1-1/8", 1-1/2", 1-5/8"
- Back Head Bars — 80° Bend Angle, 5-1/2" to 7" Bend Radius — Pro-Werks Pre-Bent Chromoly Back Bar, 4130N — 1-1/8", 1-1/2", 1-5/8" — 17" tall, 15" deep
- Seat Form Bars — Sold as a Pair — Pro-Werks Pre-Bent Chromoly Seat Bar, 4130N — Pair — fits standard configurations
- Head Bar Kit — 1" × 0.058, 90° Bend, 2 Pieces — Pro-Werks Pre-Bent Chromoly Head Bar Kit, 4130N — 6" and 18" straight legs
Custom Cage Kits & Custom Tube Bending — Built to Your Specs
Need something beyond a standard kit? Pro-Werks offers custom bending of 4130 chromoly tubing to your exact specifications. Minimum basic single bend starts at $50.00 per bend plus material. Complex pieces requiring additional layout time are charged accordingly. Please allow 5–10 business days for scheduling. Tube bending capabilities range from 3/8" to 1-5/8" OD with bend radii from 15/16" to 7" and up to 180° of bend.
- Custom Six Point Cage Kit — Front Hoop, Intermediate Hoop & Back Bar to Your Specs — Pro-Werks Custom Six Point Cage Kit — submit your dimensions via the product form for review
- Custom Tube Bending — Acute, Right Angle, Obtuse, Parallel, Dual Angle & Complex Bends — Pro-Werks Custom Tube Bending — 3/8"–1-5/8" OD, up to 180°, submit your bend diagram for review
4130 Chromoly Tubing & Plate — Raw Material Stock
The Chassis Shop stocks a large selection of premium 4130N normalized chromoly tubing and plate — meeting or exceeding MIL-T-6736B spec. Available in pre-cut lengths for easy online ordering. Tubing ships in pieces 48" or shorter for maximum shipping cost savings.
- Round Chromoly Tubing — 31 Size/Wall Combinations, 3/8" to 1-5/8" OD, 12"– 90" Lengths — 4130 Round Chromoly Tubing, Cut to Length — 4130N normalized, MIL-T-6736B spec, TIG/MIG weldable
- Chromoly Plate — 5 Thicknesses (.063"– .250"), Aircraft Grade AMS-6345-C — 4130 Chromoly Steel Plate — multiple pre-cut sizes, ideal for tabs, brackets & chassis fabrication, Made in USA
- Drop Box — 5 lbs of Assorted Chromoly or Aluminum Drops — Pro-Werks Drop Box — random mix, may contain plate, bar, or round tubing pieces, ideal for practice & small projects
Welding Consumables — TIG Filler Rods for Chromoly & Aluminum
Complete your cage build with the right filler rod. Pro-Werks stocks the same welding consumables trusted by leading chassis builders — compatible with mild steel, chromoly, and aluminum alloys.
- #65 Triple Deoxidized TIG Filler Rod — Chromoly & Mild Steel, 36" Long — Pro-Werks #65 Weld Rod — mild steel to mild steel, chromoly to chromoly, and mild steel to chromoly welds
- 5356 Aluminum TIG Filler Rod — 36" Long, for 5052 & 6061 Alloys — Pro-Werks 5356 Aluminum Welding Rod — suitable for 5052, 6061 aluminum alloys and most castings
Material Specs That Matter
All Pro-Werks cage tubing is 4130N — normalized chromoly steel, heat treated to condition N for optimal weldability and strength. Key properties:
- Meets or exceeds MIL-T-6736B specification
- Compatible with TIG and MIG welding
- Available in 0.058", 0.065", 0.083", and 0.095" wall thicknesses
- Tube diameters from 3/8" to 1-5/8" OD
- Note: Welding should always be performed by a qualified welder.
Complete Your Cage Build
Cage kits and chromoly tubing work hand-in-hand with these related components from The Chassis Shop:
- Weld Tabs & Brackets — chromoly and mild steel weld tabs, gussets, and mounting brackets for chassis fabrication
- Gussets & Bracing — pre-formed gussets and bracing components to reinforce cage joints and chassis
- All Chassis Components — the complete Pro-Werks lineup of chassis fabrication hardware, rod ends, tube adapters, and more
Proudly Made in the USA.
