NhB Exhaust for M8 Softails

• Full system exhaust including mufflers
• Mandrel bent stainless steel tubing
• 100% Argon back-purged TIG welding for high strength and precision fitment fitment
• Primary length is adjustable to optimize torque and power and includes an adaptable header mount
• Systems are constructed from ASTM269 304 stainless steel tubing for best combination of weight savings and durability
• Made in the USA

Additional Options

Standard primary length is 33 inches - call for custom length
Product includes support bracket for reverse cone megaphone muffler.
Product ships standard without O2 sensor bungs. Let Burns Stainless install them for you!

Options are:
Two (2) 12mm factory installed O2 bungs
Two (2) 18mm factory installed O2 bungs
Two (2) 12mm PLUS two (2) 18mm factory installed O2 bungs
Add desired above bung option to shopping cart

Proper Port Fitting Design

Due to the high velocity at the exhaust port, it is imperative that the flow be unobstructed. We have seen as much as a 5% loss of power for poorly matched headers and ports. To ensure proper flow, Burns has designed port fittings that properly align the exhaust header to the port. Also, the exacting dimensions of the fitting allows for better, more repeatable fabrication ensuring a proper fit on the motorcycle. On the Milwaukee 8 system, we have engineered a CNC machined fitting to improve the fitment of the pipes.

Stepped Primaries

By keeping the header size close to the exhaust port size, exhaust gas velocity is kept high at the port reducing the possibility of reversion. This is especially important with the unequal firing impulses inherent to the V-Twin single pin crank arrangement. Enlarging the tube with stepped pipes ensures that wall drag losses are minimized keeping the exhaust potential available for maximum power but also allowing for broad power band.

Collector Design

The 2-into-one collector helps minimize exhaust reversion while helping to scavenge the exhaust cylinder during each exhaust cycle. The efficient scavenging of the cylinder during the exhaust and overlap period allows for the maximum amount of air and fuel in the cylinder assuring maximum power.

Muffler

The Burns megaphone muffler provides the Pro-Stock appearance of the exhaust while maximizing performance and reducing the sound of the exhaust. The deep, mellow sound is a by product of the specially designed core perforations.

The small holes provide effective damping of sound waves while allowing for a smooth bore minimizing drag losses and improving power output.