Slip-On Exhaust Tips for Harley Davidson Dyna (1995-2017) Stainless with Baffle

High-Flow Stainless Steel Slip-On Exhaust Tips for 1995-2017 Harley Davidson Dyna (FXD)

What it Does: The Shorty GP slip-on exhaust replaces the heavy, muffled factory mufflers on the 1995-2017 Dyna to significantly reduce exhaust backpressure, drop unsprung weight, and enhance exhaust gas scavenging.

The Stock Harley Davidson Dyna Backpressure Restriction

The OEM exhaust system on the FXD platform relies on restrictive internal baffling and heavy catalytic packing designed to meet stringent decibel regulations at the expense of thermodynamic efficiency. This excessive backpressure increases cylinder head temperatures on the air-cooled Twin Cam and Evolution V-twins, choking exhaust gas velocity during the blowdown phase and stifling mid-range torque.

The Engineering Solution

Engineered for high-velocity extraction, this system features polished 304 stainless steel construction measuring 9 inches in length with a 2.375-inch exit diameter. Designed specifically to slip over factory 1.72-inch to 1.75-inch outer diameter (OD) header pipes, it eliminates unnecessary weight while maintaining thermal durability against exhaust discoloration. The integrated, removable Shorty GP catalyst baffle (dB killer) controls acoustic resonance to approximately 95 dB, preventing low-end scavenge loss without inducing turbulent flow reversion.

Technical Specifications

Compatibility

• 1995-2017 Harley Davidson Dyna (FXD, FXDB Street Bob, FXDL Low Rider, FXDWG Wide Glide, FXDC Super Glide Custom, FXDF Fat Bob)
• Fits factory header pipes with 1.72" to 1.75" outer diameter

Frequently Asked Questions

Does this fit the FXD Dyna?

Yes, this is a direct fit for the 1995-2017 Harley Davidson Dyna equipped with the Twin Cam or Evolution engine utilizing 1.72" to 1.75" OD headers.

Is an ECU recalibration or carburetor re-jetting required after installation?

While the internal baffles retain sufficient backpressure to run safely on stock mapping, ECU tuning or carburetor re-jetting is recommended to optimize the air-fuel ratio and maximize torque gains.

The Harley Davidson Muscle Standard

Built to handle extreme exhaust gas temperatures without structural fatigue, this polished stainless steel system delivers aggressive acoustic presence and clean mechanical aesthetics for authentic American V-twin power.