C1 (1. Gen.) 2005 2014 Low / High beam Ultinon Pro9100 H4 C3 (2. Gen.) 2013 2016 Low beam Ultinon Pro9100 H7 C3 (3. Gen.) 2016 2020 Low / High beam Ultinon Pro9100 H7 ISO Tolerances for Holes (ISO 286-2) ISO Tolerances for Holes (ISO 286-2) Nominal hole sizes (mm) over. 3. 6. 10. 18. 30. Ford, BMW, Audi, Volkswagen and more cars are h7 bulb compatible. You may wonder what h7 bulbs are. H7 bulbs are high-intensity discharge lamps that have a higher voltage than halogen bulbs and can be used in applications where there is a lot of heat. Testissä H4- ja H7-polttimot. Vertasimme perinteistä H4-halogeenipolttimoa nykyisin voimakkaasti yleistyvään H7:ään. Mittauksissa keskityimme kestoikään, koska kentältä kantautuneen tiedon mukaan H7-polttimot poksahtelevat huomattavasti H4:iä useammin. Testasimme vain yleisimmin tarvikeliikkeistä sekä huoltoasemilta löytyvät T10 vs 194 vs 168 Bulbs Differences and Similarities of T10 vs 194 vs 168 T10, 194, and 168 bulbs are all wedge-base bulbs that are commonly used for interior lighting in vehicles. They all utilize a wedge base, specifically the W2.1x9.5d, that snugly fits into their sockets. Their primary difference lies in the wattage. h11: 0 -60: 0 -75: 0 -90: 0 -110: 0 -130: 0 -160: 0 -190: 0 -220: 0 -250: h12: 0 -100: 0 -120: 0 -150: 0 -180: H7 +10 0 +12 0 +15 0 +18 0 +21 0 +25 0 +30 0 +35 0 H8/j7, H7/js6,H7/j6, J7/h6 Tight fits with small clearances or negligible interference. The parts can be assembled or disassembled manually. Easily dismountable fits of hubs of gears, pulleys and bushings, retaining rings, frequently removed bearing bushings. H8/k7,H7/k6, K8/h7,K7/h6 Similar fits with small Once the class of thread and part tolerance has been defined, an H limit is selected to produce a thread that is within the minimum and maximum limits for that class if fit. These limits are the same as the Go and Not Go thread plug gage dimensions. The goal is to select a tap with an H-limit that is near the middle of the part tolerance. The H7 lamp has only one filament. The H7 lamp has been improved compared to the H4 lamp and therefore has a better (brighter) light output. It is used for low beam, high beam or fog light. However, never combined. So you need a separate lamp for low beam and high beam. The cars where these lamps are used therefore have a separate reflector for Lw6sa.