Customs of Sweden was formed in 1989 by Per Graemer who also became the first president. The main purpose was to get in touch with people who like American cars built as traditional customs, and to bring them together. Initially Customs Of Sweden (then named Custom Kemps of Sweden, CKOS), consisted of a handful of custom enthusiasts but during the first year the club grew to about 20 members. Many of these die-hard custom guys are still members.

To get things working and to strength the unity, a club magazine called Lead News was started in 1990. The magazine was - and still is - influenced by the early pocket sized magazines and contains members rides, tech articles and stories about club meetings. The club also started a newsletter, Lead Letter, to inform about the latest news on the custom scene. In that same year, CKOS held its first spontaneous meet the Late Nite Outdoor Custom Meet, at a big parking lot at Hällamotet in Västerås. This was on the same weekend as Power Meet was held. About 15 cars came and just a few of them were customs.

This meeting became a tradition and some years later a drastic difference could be noticed. The number of customs at Hällamotet was close to 100 and several of them were built in a way that could compete with the best ones in the world.

The club works for the preserevation of traditional built customs and to keep this style alive. Yet, CKOS welcomes and supports innovative designs of customs built according to traditional methods; from the mid 30's Westergard styled customs to the 60's sculptured customs by Alexander Brothers. There are no strict rules within CKOS, but  we would like to point out that custom cars built during this period is what the club  focuses on.

After ten years of existence the first more organized meeting, Lead Nats, was held in Hallstahammar. It was a great success and members had a chance to meet, trade ideas and to socialize for several days. CKOS used the same meeting area the following year. The next year, 2001, the meet was held in Sundsvall, and in 2002 it was held in Älvkarleby. 2003 was a busy year for CKOS, the club participated at Pre-Summer meet in Köping and at All Customs Meet at Tramps MC in Västerås. The annual custom car parking meet, now called Lead Parking, was held in Västerås at Tramps in Jädra Hubbo. And to sum up the season of 2003, CKOS arranged Lead Crusin’ in Stockholm in late summer. In 2007 CKOS moved Lead Parking to Skultuna outside of Västerås and is still today using this area with permission and support from Skultuna Messing.

In the early 2000’s the name of the club was changed to Customs of Sweden, but the abbreviation CKOS was kept as Customs can be spelled with either C or K.

Today CKOS has about 100 members and even if it's a Swedish club it has members in other countries. The membership fee is SKR 300 :- , to be paid by Swedish postal giro 480 58 77 - 0.