Trask Nasty Bastard 2-into-1 Exhaust System | 2017-2025 M8 Touring

Trask 2-into-1 Nasty Bastard Exhaust System for Harley-Davidson M8 Touring Models (2017–2025)

The Trask Nasty Bastard is the exhaust system that serious Harley-Davidson touring riders demand when they want maximum performance and an aggressive, head-turning sound. Hand-built in Phoenix, Arizona by Trask Performance, this 2-into-1 full system is designed specifically for Milwaukee-Eight (M8) powered touring models from 2017 to 2025.

Performance-Engineered Design

The Nasty Bastard features 1-3/4” header pipes that flow into a tapered 3” to 3-1/2” turnout megaphone muffler, creating a high-flow exhaust path that maximizes horsepower and torque throughout the RPM range. At 37 inches long with a 3-1/2” billet end cap, this exhaust strikes the ideal balance between performance gains and a deep, aggressive exhaust note.

Key Features

• 1-3/4” header pipes flow into a tapered 3” to 3-1/2” turnout megaphone
• 37” L with 3-1/2” billet end cap in a turn-out style
• Includes removable performance baffle for tunable sound
• 2-into-1 system design for maximum horsepower and torque
• Stainless steel construction with megaphone-style muffler
• Available in Black or Chrome finish
• 18mm oxygen sensor bungs included
• Made in the U.S.A. by Trask Performance in Phoenix, AZ

Important Notes

• Will not fit with OEM air cleaner — aftermarket air cleaner required
• 18mm to 12mm sensor bung adapters not included; must be purchased separately if required
• Does not include O2 sensor port plugs for non-sensor applications
• Not legal for sale or use in California on pollution-controlled motor vehicles

Fitment

Fits 2017–2025 Harley-Davidson M8 Touring models including:

• FLHX Street Glide / Street Glide Special / Street Glide ST
• FLTRX Road Glide / Road Glide Special / Road Glide ST / Road Glide Limited
• FLHR Road King / Road King Special
• FLHT Electra Glide Standard
• FLHXSE CVO Street Glide
• FLTRXSE CVO Road Glide
• FLHXU Street Glide Ultra (2025)
• FLHC Heritage Classic 117 (2025)
• FLI Hydra-Glide Revival (2024)
• FLH Electra Glide Revival (2021)

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