Compare Kenworth T660 replacement headlights, from full LED assemblies and sequential turn-signal designs to projector housings with replaceable bulbs. Match the exact product’s listed years, mounting points and connections to your truck.
Choose the required Driver or Passenger side and black or chrome finish where offered. Check the main-beam light source, package quantity and any separate position-light or turn-signal wiring before ordering.
Compare the lighting system and installation details before choosing a finish. The right replacement depends on your truck’s listed application and the equipment actually installed.
Check the manufacturer part number, listed production years, housing shape and mounting points against the assembly currently installed. Product ranges differ: the OEM replacement listing covers 2007–2017, while many LED and projector designs list 2008–2017. Compatibility with another Kenworth model applies only when the exact part lists it.
An LED light bar does not necessarily mean LED low and high beams. The chrome projector assembly with LED turn signal and position light specifies H7 low-beam and HB3 high-beam halogen bulbs; full LED designs use a different lighting system. Use the selected housing’s bulb specification for future service.
Check the Driver or Passenger variation, finish and lighting style before adding a headlight to your cart. Several assemblies are sold individually. Verify what comes with the selected item, including bulbs, wiring looms and any optional upgrades, rather than assuming a two-headlight photo means a pair.
Compare the main connector and each added lighting function with the installation instructions. Some designs require the supplied LED flasher, and position lights may need separate connections. Follow the exact assembly’s lighting-use guidance, test all functions and complete beam aiming after installation.
No. Use the exact assembly’s verified year range and part number. A broad T660 category label does not extend a manufacturer’s application list.
Confirm the package quantity and variation. Several products are sold as one Driver or Passenger assembly, even when photographs illustrate both sides.
Some T660 headlight designs require the supplied LED flasher. Follow the instructions for your exact assembly rather than assuming the original flasher will work with every replacement.
Only where the exact manufacturer part lists both applications and the required years and equipment match. A shared brand or similar housing appearance is not sufficient.
Order an assembly when replacing the housing and its specified lighting components. For bulb replacement, identify the installed housing and bulb position and use that housing’s bulb specification.
No. Some projector assemblies use replaceable halogen bulbs for the low and high beams while using LEDs for position lights and turn signals. Check the main-beam specification, not only the light-bar description.
Sequential describes the turn signal’s flowing illumination pattern. Triple light bars describe the position-light design. These features do not establish fitment or package quantity; compare the exact assembly’s application and selected side.
