The D&D Fat Cat 2-into-1 exhaust system is an excellent choice for engines with performance modifications from stock to plus-25% displacement, delivering a torque curve that is high and wide, with a strong top-end pull. Excellent workmanship inside and out; broad power design really shows up on the dyno.

D&D’s philosophy is to trust their own R&D program, developing their product line to reflect what they learn during their countless hours of testing on the D&D dyno. But they didn’t stop after they made big power, they also built systems that are engineered to fit and look great! Inspect a D&D pipe, and you’ll find true craftsmanship—from the hand-ported inlets and collectors, hand-fit heat shields with machined and welded steel clamp brackets, heavy-duty mounting supports and flawless finishes, you’ll know you made the right choice for your Harley®.

All models are available in brilliant chrome or high-temperature black powder coat finish. Includes full-length header heat shields to ensure great looks over the long haul.

All 2006-up Twin Cam® Dyna® model 2-into-1 Fat Cats are equipped with dual (12 & 18mm) oxygen sensor bungs.

Louvered Baffle – Original baffle design, louvered and unwrapped to provide higher flow. Louder exhaust note and good balance of torque and horsepower.
Big Bore Baffle – High flow perforated, big bore design. Loudest exhaust note and most flow. Designed for the rider with extensive performance modifications who wants maximum high rpm output.

All Exhaust Systems listed on these pages are designed solely for Competition Race Use Only.
Not designed or legal for use on a public highway.

Not legal for sale or use in California on any pollution controlled motor vehicle.
Not legal for sale or use on any EPA pollution controlled motor vehicle.

Weight 1 lbs

Emissions Compliant

Country of Origin

Exhaust Type


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