S&S Grand National 4" Slip-On Mufflers - Harley M8 Touring
Harley-Davidson Touring M8 (2017-2024)
Proven American horsepower and deep acoustic resonance for Milwaukee-Eight baggers, backed by over six decades of S&S racing engineering.
Includes currency-adjusted exchange rate, South African customs clearance, and insured door-to-door courier dispatch from Cape Town.
Engineering & Performance Characteristics
Louvered core baffle produces internal turbulence that builds sufficient backpressure for solid low-speed city throttle response.
Engineered Highlights & Performance Gains
- Show-quality chrome finish paired with signature race-inspired end caps
- Removable dB reducers allow riders to switch between street and open sound
- Internal acoustic packing deepens bass frequencies without highway drone
- Direct bolt-on replacement for factory OEM mufflers
Technical Specifications
- Brand & Origin
- S&S Cycle
- Product SKU / MPN
- SS-550-0690 / 550-0690
- System Architecture
- Slip-On Muffler Pair
- Material Construction
- Heavy-Gauge Steel with Billet Aluminum End Caps
- Surface Finish
- Show Chrome with Black Billet End Caps
- Sound Profile
- Deep Authoritative V-Twin Bagger Growl
- Baffle Specification
- Removable dB Reducer Insert Pre-Installed
- ECU Tuning Status
- Factory Fuel Map Compatible
- Tuning Guidance
- Bolt-on install on factory headpipes; ECU tuning optional.
- Manufacturer Warranty
- 2-Year Limited Manufacturer Warranty
- Availability & Dispatch
- In Stock (Cape Town stock, 1-3 business days delivery)
Included in Box
- Pair of 4-Inch Grand National Mufflers
- dB Reducers Pre-Fitted
- Torca Clamps
- Mounting Hardware
Verified Fitment List
Confirmed compatible models for S&S Grand National 4" Slip-On Mufflers - M8 Touring. Roxstar verifies model, year, and frame clearances prior to dispatch.
Not sure if your specific model year, engine size, or aftermarket luggage brackets are compatible? Our Cape Town technicians confirm all dimensions before taking payment.
Submit your bike specs for verification →South African Courier Logistics
All orders are dispatched from our Cape Town hub via fully trackable courier services. We deliver directly to private residences, commercial addresses, or designated motorcycle performance workshops.
About S&S Cycle
Explore the full range of performance exhaust systems, tuning accessories, and precision engineered components from S&S Cycle.
View all S&S Cycle systemsMore Systems from S&S Cycle
S&S Grand National 2-into-2 High Mount - Indian FTR 1200
Indian FTR 1200, FTR 1200 S, FTR Rally & FTR R Carbon (2019-2024)
S&S MK45 4.5" Touring Slip-Ons - M8 Touring (Black/Chrome)
Harley-Davidson Touring M8 (2017-2024)
S&S SuperStreet 2-into-1 Exhaust - M8 Softail (Black)
Harley-Davidson Softail M8 (2018-2024)
S&S Grand National 4" Slip-On Mufflers - M8 Touring FAQs
Clear, evidence-backed answers regarding motorcycle exhaust fitment and supply.
How do I request fitment verification and pricing for S&S Grand National 4" Slip-On Mufflers - M8 Touring?
Does this S&S Cycle system require ECU re-tuning?
What is the delivery timeline for delivery within South Africa?
What warranty coverage applies to SS-550-0690?
Technical & Category Guides
- S&S Cycle Brand ShowcaseExplore all performance products and engineering heritage from S&S Cycle.
- Performance Products CatalogBrowse all 220+ performance exhausts, headers, and tuning upgrades.
- Fitment Confirmation GuideLearn how we verify motorcycle year, model, and sensor bung specs.
- Exhaust Tuning & Fuel MappingECU tuning, fuel management, and air-fuel ratio advisory.
Enquire on S&S Grand National 4" Slip-On Mufflers - M8 Touring
Provide your motorcycle make, model, year, and displacement for direct fitment confirmation and an official written quote.