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Validated under real load and duty cycle.
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WPM In-House Development
WPM A90 Supra Clubsport Half Cage
$2,445.00
Unlike single-stud or rivnut mounts, the WPM A90 half cage bolts to low-profile plates welded to the side impact beam and rear frame rails—the same idea as BMW’s own GTS cages—so you get a chassis-tied mount and more interior room. The bar can come back out while the plates stay under the trim.
- Docol R8, TIG welded, about 38.5 lb
- Weld-in base plates; the bar bolts on and can be removed
- Plates hide under OEM trim if the bar is removed
- Keeps the full OEM interior with notching of the sub box and trunk side carpets
- Powdercoat included
Professional installation strongly recommended; WPM installs in-house. Non-sunroof cars only. Made to order in the USA.
Why We Built It This Way.
Workshop
Designed and built in the WPM workshop.
Fitment
Designed around OEM hard points and cabin geometry.
Design
CAD-driven packaging for install clarity.
Technical Specifications.
Built around OEM hard points with materials and geometry chosen for track duty—not showroom appearance.
View specifications
- Material
- Docol R8 tubing
- Main hoop and rear bow bars
- 1.75" × .095"
- Bracing
- 1.5" × .085"
- Construction
- TIG welded; bolted joints with billet interlocking connectors
- Gussets
- Included
- Ships as
- Multiple pieces, with billet interlocking connectors
- Mounting
- Weld-in base plates; the bar bolts to the plates
- Hardware
- Included
- Sunroof cars
- Not compatible
- OEM seats and 3-point belts
- Retained
- Made in
- USA, made to order
In-house design
Fitment & Installation.
Clearance, mounting, and install sequence are designed around real chassis packaging—not a generic tube kit.
Learn moreProduct & Fitment FAQ.
Answers to common product and project questions.
How do I confirm this fits my car?
Every WPM half cage is built for non-sunroof cars. Email your year, chassis, and options before you order and we will answer directly. Ask a fitment question.
Does install require drilling, welding, or trim removal?
Yes, welding. Base plates are welded to the chassis, and the bar bolts to them. Keeps the full OEM interior with notching of the OEM sub box and trunk side carpets. Professional installation is heavily recommended.
What finish options are available?
Standard finish is satin black powdercoat. Custom is any color from Prismatic Powders. Select Custom, type the Prismatic code and color name on this product (for example, PSS-11632 Porsche Speed Yellow), then add to cart. Do not put the color on the order note. Standard and Custom are the same price.
How long is transit after it ships?
Once it ships, transit is usually 3–5 days, subject to change.
Can I cancel my order?
Yes, until the cage is powder coated. After powder coat, the order cannot be cancelled.
Can WPM install it?
Yes. Professional installation is heavily recommended, and WPM installs in-house. Ask about WPM installation.
Can I run this in my racing series?
All WPM parts are sold for off-road use only. Reach out with your application and we will walk you through how our products can meet your ruleset. Contact WPM.