SIP Performance it does exactly what it says on the label. It has been the most popular large frame tuning exhaust system for the last 10 years. Jim Lomas, himself active as a racer in the 60s, began in 1979 to produce performance orientated expansion chamber exhaust systems for two stroke motors. Due to the enormous demand from the scooter scene revival of the day, he soon decided to concentrate his efforts to the enhancement of the VESPA and LAMBRETTA scooter ranges. The later emerging German and Austrian street racer scene were in need of a pipe that could be used for maximum power and rev range setups, with an especially voluminous expansion chamber for low to mid range torque delivery. In 1997 we combined our strengths with Jim's and developed the SIP Performance expansion chamber system: loads of oomph from way down the rev range, stainless steel construction, allows the use of a main stand and wide tyres. Over the years this system has been constantly improved and updated.