Shimano R6600 Ultegra groupset with 105 shifters. The ‘SL’ meant the groupset was light than regular Ultegra and sat closer to Dura-ace. I bought this set new in 2007 and fitted to my TT bike. I’ve completely stripped the bike and kept the frame but decided to sell the groupset so someone else can build up a cool period bike. I’ve tried to show the very minor blemishes in the photos as the components are in excellent condition. Only the shifters show any real signs of age with those weird lines that appear on older levers.
eBay