This easy-to-install kit uses factory connections and mounting points. With the relay kit, the electrical current travels straight from the battery to the headlight circuit at the fuse box, greatly reducing the load on the headlight switch and the failure prone column switch. In addition, more power is supplied to the headlights for maximum light output.
Fits 911 (1974-89). Maximum 100 watt bulbs recommended.
The (discontinued) Bosch H1 kit is similar to the H4, except that it has dual reflectors that allow for individual adjustment of both the high beams and low beams. The H1 assemblies use the same sized housing and a similar, but different lens. Internally, the H1 has an additional reflector for focusing the high beam. Original H1 kits are no longer available, however, replacement bulbs and lenses are indeed still available for replacement.
Apply this impact-resistant, non-yellowing protective film and end the risk of costly lens replacement. Precut to correct shape and self-adhesive, the .040" film goes on in seconds for years of protection.
Headlight Protection Film (80 mil, pre-cut, pair) for Bosch H1 or H4 Lights, 911 (1965-86) [More Info]
Headlight Protection Film (80 mil, pre-cut, pair) for Standard Sealed Beam 6 7/8" round headlights with cut-outs for the 3 alignment pins [More Info]
Headlight Protection Film (80 mil, pre-cut, pair) for Fog Lamps, 911 Carrera (1984-89) [More Info]
Headlight Protection Film (80 mil, pre-cut, pair) for Bosch H5 Lights AND Fog Lamps, 911 Carrera (1987-89), 911 Carrera 2/4 (1989-94) [More Info]