Overview
The PIAA 9006 (HB4) Xtreme White Plus is a 4000K headlight bulb listed at 51W=115W, sold for vehicles that take a 9006 (HB4) socket. PIAA positions it as a direct OE replacement upgrade, so the goal is a straightforward swap into a factory-style socket with no new wiring described.
The cool white output lights road hazards and street signs earlier than a normal halogen bulb. XTRA Technology pairs a proprietary gas mixture with an aerospace alloy filament, and it is designed to give more light than the rated power draw. The bulb is engineered for sustained performance under vibration and moisture, which suits drivers who want more light from a 9006 (HB4) socket.
Key features
- 4000K color that PIAA says aids recognition, contrast and depth perception
- XTRA Technology gas mixture with an aerospace alloy filament
- Quartz glass and alloy filament built for durability
- Built for sustained output where vibration and moisture protection are needed
- Designed to make the most of stock or aftermarket lighting
- DOT/SAE compliant with a long life rating
Matching the socket
The 9006 (HB4) and 9005 (HB3) bases look similar but are not interchangeable. Before buying, pull the old bulb and read the base number printed on it, then match that number exactly. A bulb that sits loosely in the socket can vibrate out of position, so make sure it seats fully and locks in place.
Older headlamp sockets can become brittle or discolored with heat. If the socket shows browning, cracks or a loose fit, replace it before installing a new bulb, since a poor connection can overheat the new bulb and cause early failure.
- Read the base number on the old bulb before buying
- Seat the bulb fully and check that it locks
- Inspect the socket for heat damage
Specifications
| Brand | PIAA |
|---|---|
| Bulb base | 9006 (HB4) |
| Color temperature | 4000K |
| Power rating | 51W=115W |
| Glass | Quartz |
| Filament | Aerospace alloy |
| Compliance | DOT/SAE compliant |
| UPC | 722935196169 |
Vehicle fitment
Fitment is universal, so the 9006 (HB4) base decides the match. Compare that base with the bulb type your headlamp uses before fitting.
Bulbs with a 9005 or H11 base will not match a 9006 (HB4) socket. Confirm your vehicle’s year, model and trim before ordering.
Installation notes
Replacement is by bulb base only. Switch the headlamps off and let the bulb cool before removing it, and keep fingers off the glass.
What’s included
Check the package contents against your installation before starting.
Not included: Socket adapters and wiring are not included.
