9006 9005 to H4 Conversion SLIMLINE Ceramic Relay Wiring Harness 100w Headlight Foglight Bulb Booster AutoTechSalon JDM EDM 12v PlugNPlay Dual MONSTROUS 40amp independent relays, housed in beautiful translucent casings, offering the highest level of protection and reliable operation for h4 bulbs up to 100 watts! Redesigned monoblock relay input assembly offers more robust durability than our previous design. Simple plug and play 30 minute installation! ZERO cutting or splicing. Retain all original vehicle integrity and functionality. Can convert any 4 bulb 9006/9005 headlight system into a fully functional dual filament H4 headlight setup, or vice versa! Especially perfect for those wanting to perform jdm or euro spec headlight conversions where the bulb sizes differ. No more dangerous and confusing cutting/splicing! Or can simply be used to upgrade your existing 9006/9005 or h4 bulbs to increase stock bulb brightness, or upgrading to increased wattage bulbs which would melt flimsy OEM bulb sockets and wiring. NEW Custom snug-fit flexible rubber insulation tubing offers a space saving of over 50% over our previous version's loose-fit ribbed plastic insulation. MUCH greater wire flexibility for tight angles + vastly increased space saving = a far more elegant and streamline installation Includes 3 industrial strength translucent zip ties as a bonus, for a complete 'out of the box' upgrade solution