Description
The Arrow 71704MI is a racing collector, or header manifold, made for the Honda CB650R and CBR650R (2019-2023). A collector is the section of an exhaust system that gathers the gases from each cylinder’s exhaust ports and channels them toward the silencer, and its design has a direct influence on gas flow, performance and overall system weight. This unit uses a 4:2:1 configuration, merging the four cylinder outlets into two pipes and then into a single junction that feeds the silencer. It is manufactured from INOX stainless steel of AISI 304 grade, chosen for a light and compact assembly that supports performance gains over the original component. The collector is supplied with provision for the original equipment sensor mounting point, so the bike’s oxygen or CO sensor can be refitted. It is designed to connect directly to Arrow’s matching Pro-Race silencers, such as the 71217 series, forming a complete racing exhaust system. As a racing part, this collector is intended for off-road and track use only and is not road legal in many jurisdictions. Installation typically requires pairing it with a compatible Arrow silencer rather than the stock muffler.
