C6 Corvette, 2005-2013 All models, D1S HID Bulbs, Low Beam: Morimoto XB HID, Pair

No Comparison: When it comes to HID bulbs, Morimoto has always brought us the best in the aftermarket, and their latest examples are no exception. Sure we think the options from Philips and Osram are great too, but when it comes to bang for the buck - nothing compares to the Morimoto XB HID lineup. Compatible with 35W and 55W: The XB's will produce more lumens, last longer, project farther, and look better doing it.
Luminosity: At the heart of the XB D1S bulbs is their perfectly aligned 100% Philips quartz glass that houses a capsule from APL-USA. Using high quality halide salts from German-supplier Messer; the bulbs produce nearly the same luminosity (intensity) as the amazing Osram CBI bulbs at 5500K. No, you're not seeing things here, but yes you will be seeing everything at night. In our Comparison to the big brands; Morimoto's XB capsule ran with the best of em!
Long Life: The Austrian-sourced Plansee electrodes help keep the bulbs running brighter for longer. In comparison to a Philips bulb with 200 hours of use; the Morimoto will maintain 83% of it's intensity whereas the Philips bulb will retain 86%. Yeah, the Philips maintains a little longer, but this kind of longevity is unheard of in the aftermarket. We're impressed!
Precise Alignment: Morimoto's Symmetry-Structure frame surrounds the base of the glass capsule keeping everything properly lined up, which is paramount when it comes to HID bulbs. In the past we all agreed that precision wasn't the strong suit for the XB bulbs...but the latest are indeed the greatest - and they're now consistently well-aligned, which is a good thing - because it means the output is also consistently bright and uniform throughout.