Adapter: H4 Male > H13 Female GMC Replace all together to save

Replace all together to save time and hassle

The resistors get so hot they can melt some light plastic and short wires

while the inner projector is for high beam

Upgrade your lighting game with the advanced third-gen MotoControl 8-Pin Relay

Adapter: H4 Male > H13 Female GMC Replace all together to saveUseful: Sometimes "this" just doesn't plug into "that" When the industry standard for aftermarket lighting calls for mostly 9006 Female inputs, these adapters will come in handy. Go Direct: If your vehicle's stock headlight circuit is strong enough to power ballasts without a relay harness, these are the perfect solution for non 9006 headlight systems since almost all HID ballasts require a 9006 female input. Standard: These are standard equipment on