2-Into-1 Exhaust System

The Horsepower Inc. HPI-EXM8B-S is a full-length 2-into-1 stainless steel exhaust system meticulously engineered for Harley-Davidson M8 Touring motorcycles. The true full-length design of the HPI-EXM8B-S is optimized to improve exhaust flow throughout the entire RPM range. This results in noticeable gains in throttle response and a substantial increase in low- and mid-range torque, precisely where touring bikes benefit most. The exhaust delivers a deep, aggressive tone without being overly harsh, complementing the enhanced performance. The construction features clean TIG welds, which not only contribute to the system's longevity but also guarantee a precise fit and a clean aesthetic. The system includes 18mm O2 sensor bungs and reducers for 12mm sensors, offering broad compatibility. Important: Installing an aftermarket header system or a full exhaust system like the HPI-EXM8B-S requires additional tuning for optimal performance and engine health. If a tuner is not already in place, a ThunderMax tuner is recommended.