--D&D's Secret Weapon - Collaboration with UTA’s Engineering Department Produces D&D’s New Concentric Flow Baffle System.

D&D has a secret weapon in reduced noise reduction and significant mid-range torque gain – Dr. Bob Woods from University of Texas at Arlington Mechanical & Aerospace Engineering department along with his students Erin Busk, Eric Luke, Robby Bernard and Thomas Cross have collaborated with D&D Performance Enterprises on a new exhaust pipe technology for Harley-Davidson’s 2009 XR1200 motorcycle.

The new technology is called the Concentric Flow Baffle System, which is fitted into the factory’s new XR1200 exhaust pipe called the Bob Cat exhaust.

The Bob Cat is the first D&D pipe to utilize this new technology. The benefit of using the system includes reduced noise, performance improvement and enhanced Harley-rumble. The Bob Cat is the perfect aftermarket exhaust trifecta.

“I want to thank Dr. Bob and his team for collaborating with D&D in the design of this new baffle system,” said Dave Rash, The Pope of Pipe. “It’s a testament to their engineering knowledge and capability that led us to this breakthrough technology.”

D&D’s Concentric Flow Baffle System will first appear on the XR1200 full system exhaust in March 2009 and will be available in all Harley models by the 3rd quarter 2009.

In 1972 David Rash could not find the exhaust pipe he needed for his race bike. He knew that the proper exhaust for his engine configuration would give him an edge over his competition so he fabricated one himself.

Thirty years and 250,000 pipes later D&D Performance Exhaust systems are some of the leading performance motorcycle exhaust systems in the world.

--Jeff Najar