Slip-On Exhaust Tips for Harley Davidson Softail (1986-2017) Stainless with Baffle

High-Flow Slip-On Exhaust Tips for 1986-2017 Harley Davidson Softail (FXST / FLST)

What it Does: The Shorty GP Slip-On Exhaust Tips replace the heavy, restrictive factory mufflers on the 1986-2017 Harley Davidson Softail to reduce exhaust backpressure and optimize scavenging velocity.

The Stock Harley Davidson Softail Flow Restrictions

Factory exhaust assemblies on the FXST / FLST platform are engineered to meet stringent decibel compliance through dense multi-chambered baffles. This internal routing chokes flow on Evolution and Twin Cam V-twin engines, trapping excessive thermal energy at the exhaust port and dampening throttle responsiveness. Furthermore, bulky OEM silencers add unnecessary hanging weight to the chassis without providing the exhaust scavenge required for optimal low-end torque.

The Engineering Solution

These 9-inch Shorty GP slip-on tips deliver a direct, low-restriction exhaust path engineered specifically for factory header pipes measuring between 1.72-inch and 1.75-inch outer diameter. Constructed from heavy-gauge polished stainless steel, they resist thermal discoloration and structural cracking under high-vibration engine cycles. The assembly includes integrated, removable dB-killer catalyst baffles that moderate acoustic output to approximately 95 dB while maintaining the gas velocity necessary to preserve low-end cylinder filling efficiency.

Technical Specifications

Compatibility

• 1986-2017 Harley Davidson Softail models (including Heritage Softail, Fat Boy, Night Train, Deluxe, and Standard)
• Compatible exclusively with OEM header pipe diameters between 1.72" and 1.75" OD

Frequently Asked Questions

Does this fit the FXST / FLST Softail?

Yes, this is a direct fit for the 1986-2017 Harley Davidson Softail equipped with the Evolution or Twin Cam engine retaining stock 1.72" to 1.75" OD header pipes.

Is an ECU re-tune or carb rejetting required after installation?

Tuning is recommended to optimize the air-fuel mixture, but the system functions safely without immediate tuning when the included dB killers remain installed.

The Harley Davidson Caliber

High-displacement American V-twin engines demand exhaust components that withstand extreme thermal cycles and severe chassis vibration while delivering crisp throttle response and a distinct mechanical exhaust note.