A direct-fit LED bulb swaps into the original headlight housing (for example H4 or HS1 socket) for brighter, whiter light without cutting the housing. Legal note: Generally accepted when it is a true drop-in replacement that keeps the stock beam pattern and does not cause excessive glare to oncoming traffic, since it does not change RC particulars. Bulbs that require housing modification, or that scatter light, can be treated as an illegal lighting alteration under the CMVR and Section 52. Buy from established brands with proper cut-off; no RTO approval usually needed for a compliant drop-in. Read more
