Another particular need was the basis to start development for Indy-Race shape: there were some bikes whose design was so demanding that none of the existing Arrow silencers was capable to fit in. This new shape, whose section remembers the "oval" of some USA race tracks (and so the name), is a bit "squeezed" respect to the others, giving a good inner volume to be used to keep under control the noise levels. With respect ot the other technical features, there are no great differences with the other product lines made by Arrow: inner parts are made in stainless steel, manufacturing is being made with TIG and MIG welding, the canister is available in titanium, aluminium or carbon fibre and in some cses a carbon fibre endcap is available. Also, Indy-Race silencers are available also in a street legal version, with dB-killer.