The AS pipe is an innovation from Rucika with unique material characteristics so that it can withstand hot exhaust water and reduce noise (low noise). The US pipe was developed from a special material, AstolanĀ®. AstolanĀ® is a special formula from a patented Mineral Reinforced material with Polypropylene. Pipes and pipe connections (fittings) are designed with a Rubber Ring Joint (RAJ) connection system so that it makes the connection process easier. US pipe has a complete size so as to provide flexibility in the design of an integrated exhaust system. US Pipes offers an optimal solution with a long service life compared to cast iron.