Got the 2025-model M6S set for a 2000 Saab 9-3 Viggen to replace the ailing halogens (see note below for CANBUS compatibility), and you might as well be comparing a flashlight to the sun. Immediately had enhanced clarity and field of view, as well as significantly better sight range at night without being blinding to oncoming motorists. The Auxito yellow foglights complement these nicely, too.//
The build quality and thoughtful design are excellent for the price point, and even better on sale. The units have a solid construction with apparently high quality materials, and they perform to match.//
The yellow high beams are awesome, not only for appearance, but much better visual acuity in no light or storms, with impressive range as a plus. The yellow beam cuts down on glare and self-blinding in heavy fog, which was a major advantage during some weird weather. They also have a fun secondary use for signaling on the road, good for getting the attention of left-lane hangers. And, ya know, yellow because racecar.
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A note on CANBUS compatibility: these will operate perfectly well although the SID will show "Front Bulb Failure" warnings. Since the LEDs draw less power, these faults can be eliminated with a related H13 CANBUS Decoder that just snap in between the connector and bulbs.
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Another note: take some time to ensure your headlights are aimed properly; mine were pretty cross-eyed after many years on the road.