Butyl: OCI (Black) GMC Superior Illumination:Â The Philips 42406

Superior Illumination: The Philips 42406 D4R Bulb offers industry-leading brightness for safer driving

Don't Skimp

they also apply another coating to protect the lens against yellowing and oxidation

And don't forget our purpose-designed Wire Harness

glare reduction

Butyl: OCI (Black) GMC Superior Illumination:Â The Philips 42406Back again: The OCI glue was the retrofitters industry standard for years until Morimoto's RetroRubber came out. It's back again by popular demand from those who don't like the harder, more OEM like consistency of the RetroRubber and prefer the softer OCI. Whatever you prefer, we got it! Usually: The original glue will suffice but if you're having moisture problems, or want to definitely avoid them: here's the answer. OCI is an automotive supply