Looking for a simple, affordable head unit conversion kit to upgrade your tub-to-shower setup or vehicle lighting system? This guide highlights five practical options that balance ease of use, durability, and value. Each product is suited to specific needs—bathroom renovations for tub-to-shower conversions, or automotive lighting upgrades for HID ballast replacements. The table below provides quick at-a-glance details to help you compare before diving into each product section.
| Product | Brand | Best For | Why Selected |
|---|---|---|---|
| GBBNE Convertor Shower Unit Spout-Type Add-On Tub Shower Conversion Kit Polished Chrome | GBBNE | Tub-to-shower conversion in modern bathrooms | Sturdy SUS304 steel riser, 1.8 GPM flow, wall-mount design |
| Pyhomestrim Clawfoot Tub Shower Kit | Pyhomestrim | Clawfoot or vintage-style bathrooms | All-in-one kit with upgraded rods and a 6-inch shower head |
| O-NEX Xenon D3S D3R Ballast | O-NEX | Vehicle HID ballast replacement | Plug-and-play direct replacement for factory units |
| HiSport Xenon HID Ballast Headlight Control Unit | HiSport | Vehicle headlight ballast replacement | Six protections, OEM-style fit, straightforward installation |
| Bog Deathgrip BALLHEAD Conversion Complete KIT | Barker Outdoors | Travel photography or outdoor setups | Lightweight, full range of motion, complete hardware |
GBBNE Convertor Shower Unit Polished Chrome

The GBBNE Polished Chrome tub-to-shower conversion kit is designed for bathrooms that lack a built-in shower. It uses a SUS304 steel riser with ABS components for corrosion resistance, delivering a steady 1.8 GPM flow. Best for rental properties, basements, or budget remodels where a clean, modern look is preferred. The kit includes a wall-mounted riser and a 360° swivel shower head for flexible angles. A key limitation is the 70-inch riser length; ensure ceiling clearance and tub layout accommodate the tall install.
Who this is best for: home owners upgrading a tub without a shower, landlords who need a durable, simple replacement, and DIY remodelers seeking a streamlined wall-mount solution.
Why selected: It combines robust materials, a straightforward diverter mechanism for easy tub-to-shower switching, and a design that fits most standard bathtub configurations.
GBBNE Convertor Shower Unit Matte Black

Another finish option from GBBNE, this Matte Black version shares the same multi-material construction and 1.8 GPM flow as the polished chrome model. Best for contemporary bathrooms with matte fixtures, it provides the same easy tub-to-shower conversion and wall-mounted installation. The primary caveat is similar ceiling height considerations; ensure room in the bathtub area for the 70-inch riser and overhead spray head.
Who this is best for: homeowners pursuing a cohesive matte black bathroom aesthetic while adding a tub-to-shower upgrade.
Why selected: It offers the same reliability with a modern finish that matches matte fixtures and hardware.
Pyhomestrim Clawfoot Tub Shower Kit

This all-in-one clawfoot tub shower kit is designed for traditional clawfoot and vintage-style tubs. It includes a clawfoot faucet set, shower riser, ceiling support, wall brackets, and a 6-inch rainfall shower head. Best for retro bathroom renovations or renovations that emphasize classic styling. A potential limitation is the heavier weight and longer installation time compared to simpler spa-style tub-to-shower kits.
Who this is best for: homeowners restoring a vintage bathroom or those retaining clawfoot aesthetics while adding a modern shower option.
Why selected: It provides a complete upgrade with sturdy hardware and a larger overhead shower head for a more immersive shower experience.
O-NEX Xenon D3S D3R Ballast

This Xenon ballast is a factory-style direct replacement designed for certain Dodge Challenger and Charger models. It is a plug-and-play option that simplifies HID headlight maintenance and reduces the need for complex re-wiring. Best for drivers seeking an OEM-style replacement that minimizes downtime and avoids programming. A limitation is compatibility; confirm the part numbers and vehicle model before purchase to ensure a proper fit.
Who this is best for: car owners performing a HID ballast replacement on compatible Dodge vehicles.
Why selected: It provides a straightforward, direct-replacement path to restore HID performance with minimal mechanical intervention.
HiSport Xenon HID Ballast Headlight Control Unit

HiSport’s headlight ballast control unit is designed for Chrysler 300 models among others and includes comprehensive protection (over-voltage, over-current, overheating, short-circuit, reverse polarity, no-load). It’s a direct replacement that matches OEM connectors and mounting points for easy installation. Best for drivers who want a robust, plug-and-play HID ballast with built-in protections. A possible limitation is vehicle model compatibility; verify the exact fitment numbers before ordering.
Who this is best for: drivers seeking a durable HID ballast with built-in safety protections and OEM-style fit.
Bog Deathgrip BALLHEAD Conversion Complete KIT

This light, portable ballhead conversion kit focuses on photography gear and outdoor applications. It includes all mounting hardware for quick installation and offers full motion for precise positioning. Best for travelers or outdoor shooters who need a compact, adaptable ballhead. A caution is that it’s not a fixed, heavy-duty studio option; weight and size are optimized for portability rather than maximum torque.
Buying Guide: Key Purchase Considerations
What should you check before buying a head unit conversion kit? Consider installation space, compatibility, material quality, and the intended use. For bathroom tub-to-shower conversions, prioritize wall-mount stability, diverter reliability, and flow rate. For vehicle HID ballasts, verify OEM-fitment numbers and vehicle compatibility. If aesthetics matter, choose finishes that match existing hardware. Always confirm dimensions, ceiling clearance, and whether extra adapters are required for a proper fit.
Frequently Asked Questions
- What is a head unit conversion kit used for? It upgrades or converts a component to a compatible head unit or system, such as tub-to-shower configurations or HID ballast replacements in vehicles.
- How do I know if a kit fits my tub or car? Check product specifications for compatibility details, including model numbers, dimensions, and mounting requirements. When in doubt, contact the seller for exact fitment guidance.
- Are these kits easy to install yourself? Most are designed for DIY installation with common tools, but some projects may require intermediate plumbing or electrical skills. Follow included instructions closely.
- What materials matter most in these kits? For bathrooms, stainless steel and ABS parts resist corrosion; for HID ballasts, OEM-style connectors and protective features improve reliability.
- Can I mix finishes or brands in a project? Yes, but ensure the finishes and connection types are compatible with your existing fixtures to maintain aesthetics and function.
- Is there any maintenance required? Regular inspection of diverters, seals, and electrical connections helps sustain performance and safety over time.