Dyna Bro Yo!

 DYNA BRO YO!

Stainless-steel 2-1 performance exhaust for Twin Cam and Evolution Dyna models

The Dyna Bro Yo! is built for riders who want real SQ1 performance with a raw, aggressive exhaust note. Its stepped stainless-steel primaries feed into our signature Guppy Collector, helping maintain exhaust velocity, reduce reversion, and produce a broad, usable powerband.

Finished with a Neighborhater-style muffler, it barks at idle and screams when you get into the throttle. Dyna bro approved.

FITMENT

● 1999–2016 Harley-Davidson Twin Cam Dyna

● Evolution-powered Dyna models

● Control compatibility: Forward controls and mid controls

QUICK SPECS

● Construction: Stainless steel

● Configuration: 2-1 full system

● Headers: Stepped primaries

● Collector: SQ1 Guppy Collector

● Muffler: Neighborhater-style baffle

● Finish options: Raw stainless or polished

● Sound level: Very loud

● Power focus: Strong exhaust velocity, reduced reversion, and broad usable power

WHAT’S INCLUDED

● Exhaust system

● Transmission mount

● Mounting hardware

● Exhaust gaskets

● Muffler springs

NOT INCLUDED

● Exhaust flanges

● Flange nuts

Reuse the original Harley-Davidson exhaust flanges and flange nuts, or purchase replacements from the SQ1 Parts and Hardware collection.

THE SOUND

The Neighborhater-style muffler uses a straight-through internal design for maximum airflow and a raw, crisp exhaust note. It is loud at idle, aggressive under throttle, and designed to reduce the interior drone commonly associated with straight pipes and basic chambered mufflers.

TUNING

A proper EFI calibration is recommended after installing a full exhaust system. Carbureted models may require jetting or fuel-system adjustments