Harley-Davidson

These Angry 400 Series 4" slip-on mufflers deliver a deep, aggressive roar for Harley-Davidson Milwaukee-Eight touring models. A race-inspired stepped baffle core and modular design with swappable baffles and billet endcaps let riders customize sound and style without requiring an aftermarket tuner.

These Slip-Ons are built with stainless steel Angry Baffles , black or 3-step chrome billet endcaps, and are mounted using a sleek, weld-free system utilizing stock header pipe clamps. These Slip-Ons are compatible with several Harley Touring models, including Milwaukee 8 107, 114, 117, 121 CVO, 128 & 131,135+ engines

These Angry 420 Slash touring slip-on mufflers are built for Harley-Davidson Milwaukee-Eight touring models from 2017–2026, offering adaptable exhaust sound and strong low-end performance. Rigid 16-gauge 4-inch bodies, race-inspired CNC-machined 4.2-inch billet end caps, and a stepped baffle core create a deep, aggressive roar with smooth torque delivery. A modular design with swappable baffles and end caps lets riders fine-tune rumble and volume to match their riding style. 

These Slip-Ons are compatible with all M8 Harley Touring models 2017 and up, including Milwaukee 8 107, 114, 117, 121 CVO, 128 & 131,135+ engines

Forsch Performance Slip-On Mufflers for Harley-Davidson Touring models. Featuring large 4-inch x 16 gage steel tuning chambers finished with race-inspired CNC machined 4.20" billet race cut end caps, The Forsch M8 Angry series of Mufflers are designed and built to give your (2017-2025) bike a deep and aggressive roar. Our 420 end caps maximize the exhaust scavenging area resulting in a unique sound curve, different to our standard 4.0" end caps.  All Forsch pipes are internally coated with a heat and corrosion resistant ceramic coating to protect the exterior chrome or black finishes. coated to Harley-Davidson OEM factory specifications for ultimate durability 

• Modular design for swappable baffles and endcaps
• 420 Angry Endcaps featuring 10x tuning ports, unique within the Forsch Performance collection of mufflers
• Standard Black, or Chrome End caps 
• Sleek Weld-Free mounting system 
• Utilize stock header pipe clamps (size: 1.75" LH, 2.5" RH)
• Harley Touring 107ci to 131ci 
• OEM HD plating and coatings

*Angry™ II baffles are recommended for stock (and modified) motorcycles in most common riding conditions, while allowing your factory HD engine ECU to maintain the proper air fuel ratios. So long as Forsch Angry 2 mufflers are your only alteration on your motorcycle, no aftermarket tuner is required, however we do recommend SE or other aftermarket tuner to further enhance the performance and sound of your ride. 

Allow 1-3 weeks for manufacturing time, or call for availability

These Angry 420 Slash touring slip-on mufflers deliver a deep, aggressive roar and customizable sound for Harley-Davidson Twin Cam touring and trike models from 1998–2016. Large 4-inch bodies with dual stepped baffle cores, CNC machined billet end caps, and a modular design let you swap baffles and end caps to fine-tune both tone and style while using a clean, weld-free installation on stock header pipe clamps.

Fitment:  1998-2016 Twin Cam touring models and M8 Trike /  Road Glide 3

Fits all 4.0" Forsch pipes, These CNC Machined Billet Aluminum 6061 T6 Endcaps enhance the look of your ride with a sleek bolt-free endcap mounting system, FORSCH PERFORMANCE laser engraved logo.

Includes Hardware Kit (10 pcs 1/4-20 x 1-1/2" 316 SS Socket Head Cap Screws)

Oversized just right @ 4.2" these fit all 4.0" Forsch pipes, CNC Machined Billet Aluminum 6061 T6 Endcaps enhance the look of your ride with a sleek hidden  bolt endcap mounting system (common with all Forsch 4" mounting) "FORSCH PERFORMANCE" laser engraved logo, and 4 tuner ports for the enthusiast looking for a unique sound with excellent deep thundering base 

Includes 2 endcaps &  Hardware Kit (6 pcs 1/4-20 x 1-1/2" 316 SS Socket Head Cap Screws, washers & loctite) allow 3-4 days extra for Skulls Laser Engraving (made to order)

Oversized just right @ 4.2" these fit all 4.0" Forsch pipes, CNC Machined Billet Aluminum 6061 T6 Endcaps enhance the look of your ride with a sleek hidden  bolt endcap mounting system (common with all Forsch 4" mounting) "FORSCH PERFORMANCE" laser engraved logo, and 10 tuner ports for the enthusiast looking for a unique sound with excellent deep thundering base 

Includes 2 endcaps &  Hardware Kit (6 pcs 1/4-20 x 1-1/2" 316 SS Socket Head Cap Screws)