Mistral single wall large diameter header pipes with torque modulator expansion chamber for V7 Racer, V7 Stone, and V7 Special 2014-2015*. This version is stainless steel with a satin finish. The torque modulator chamber claims to improve the throttle response and torque at low and medium throttle positions. The single wall construction results in a larger effective internal diameter (35.25mm) and approximately 40% weight savings over stock. These are bolt on header pipes, no modifications are required.
*These American market 2014 and 2015 (also 2013 not-USA) models have a single throttle body fuel injection system and have two lambda sensor ports (one port in each head pipe).