Adapter: H4 Male > H13 Female GMC while the inner projector is

while the inner projector is for high beam

you can easily set them up in whatever shade of red

If in the rare case something goes wrong

lower profile for an easier installation

Adapter: H4 Male > H13 Female GMC while the inner projector isUseful: 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