S&S Cycle 50-State Superstreet 2-Into-1 Exhaust System For Harley Softail (2018–2026)
CARB-Compliant 50-State Legal Power & Classic 2-Into-1 Milwaukee-Eight Performance
Enjoy maximum torque gains, aggressive lean angles, and complete EPA emissions peace of mind with the S&S Cycle 50-State Superstreet 2-Into-1 Exhaust System. Precision-engineered for 2018 through 2026 Harley-Davidson Softail models, the Superstreet series bridges the gap between high-output race performance and 50-state emissions compliance (CARB EO# K-010-1).
Featuring S&S Cycle’s high-flow stainless steel catalytic converter technology integrated directly into the collector, the Superstreet system delivers verified power increases across the entire RPM curve without violating state or federal emissions standards. Its equal-length stepped primary headers scavenge exhaust gases efficiently, while full-coverage heat shields maintain a flawless finish against thermal distortion.
Technical Specifications & Product Details
| Feature / Metric | Product Specification | Rider Benefit |
|---|---|---|
| Brand / Manufacturer | S&S Cycle | American icon in high-performance V-Twin engine components and exhaust systems |
| Emissions Standard | 50-State Street Legal (CARB EO# K-010-1) | 100% emissions compliant in all 50 US states, including California |
| Exhaust Architecture | Stepped 2-Into-1 Header with High-Flow Collector | Optimizes backpressure and gas velocity to maximize low and mid-range torque |
| Muffler & Core Design | Classic Stainless Megaphone / High-Flow Catalyst Core | Delivers a rich, deep V-Twin exhaust note while keeping emissions clean |
| O2 Sensor Integration | Dual 12mm & 18mm O2 Sensor Ports Included | Direct bolt-on installation compatible with factory ECU sensors |
Performance Engineering & Acoustic Dynamics
### Street-Legal Scavenging & High-Flow Catalysts
Traditionally, riders had to choose between legal compliance and true performance gains. S&S Cycle eliminated that compromise by engineering a high-flow catalytic converter housing directly within the 2-into-1 merge collector. Combined with stepped primary header dimensions, this system accelerates exhaust gas velocity, generating strong cylinder scavenging while maintaining clean combustion burn and full 50-state legality.
### Aggressive Lean Angle & Deep Acoustic Tone
Designed with performance bagger and club-style aesthetics in mind, the S&S Superstreet muffler sweeps up neatly alongside the Softail frame. This high-and-tight stance delivers exceptional ground clearance for deep cornering without scraping. Its internal perforated core produces a deep, low-frequency rumble under roll-on throttle without harsh harsh metallic noise at steady cruise.
Vehicle Compatibility Guide
S&S Cycle 50-State Superstreet 2-Into-1 Exhaust Systems offer direct fitment for 2018–2026 Harley-Davidson Softail models equipped with Milwaukee-Eight (M8) engines:
### Compatible Harley-Davidson Softail Models (2018–2026)
- Harley-Davidson Low Rider / S / ST: FXLR, FXLRS, FXLRST (2018–2026)
- Harley-Davidson Street Bob: FXBB, FXBBS (2018–2026)
- Harley-Davidson Softail Standard: FXST (2020–2026)
- Harley-Davidson Fat Bob / Fat Boy: FXFB, FXFBS, FLFB, FLFBS (2018–2026)
- Harley-Davidson Heritage Classic & Slim: FLHC, FLHCS, FLSL (2018–2026)
Fitment Note: Compatible with mid-controls and forward-control Softail models; appropriate mounting bracket hardware and floorboard spacers are included. Because this system maintains emissions compliance, it can be run with factory fuel mapping, though an aftermarket tuner can optimize throttle feel further.
Step-by-Step DIY Installation Overview
Installing an S&S 50-State Superstreet 2-into-1 exhaust system is a simple, direct bolt-on procedure. Estimated installation time: 2 to 3 hours.
### Required Tools
- Motorcycle Frame Jack / Center Lift
- 3/8″ Drive Torque Wrench & Ratchet Set
- 1/2″ & 9/16″ Combination Wrenches
- O2 Sensor Wrench and new wire-woven exhaust gaskets
### Step 1: Stock Exhaust Removal
Secure the motorcycle on a frame lift. Disconnect the front and rear oxygen sensor wire harness connectors. Unbolt factory support brackets, remove exhaust flange nuts at the cylinder heads, and lift the stock exhaust system clear of the chassis. Remove worn port gaskets.
### Step 2: Bracket Assembly & Port Preparation
Thoroughly clean cylinder exhaust ports and press fresh wire-woven gaskets into place. Mount the supplied S&S Heavy-Duty frame bracket loosely to the Softail frame rails to allow adjustment during header alignment.
### Step 3: Installing S&S Headers & Megaphone
Apply anti-seize compound to oxygen sensor threads and install them into the Superstreet header bungs. Fit primary headers onto head studs, join the 2-into-1 collector, and attach the upswept megaphone. Torque flange nuts evenly to factory specs, wipe down pipes with isopropyl alcohol to prevent fingerprints from baking into the finish, reconnect O2 sensors, and test run the bike.
Frequently Asked Questions
### Is this exhaust truly 50-state legal in California?
Yes. The S&S Superstreet 50-State exhaust carries a Executive Order (CARB EO# K-010-1) certification from the California Air Resources Board. This makes it completely legal for street use on public roads and highways in California and all other 49 states.
### Do I need to buy a fuel tuner when installing a 50-state legal exhaust?
Because the 50-state legal S&S Superstreet retains factory-compliant backpressure and catalyst flow, it can be safely operated with stock engine ECM tuning. However, adding an aftermarket flash tuner can further smooth out throttle response and maximize rideability.
### Order Your S&S 50-State Superstreet 2-1 Exhaust Today
Enjoy street-legal Milwaukee-Eight torque, aggressive cornering clearance, and proven S&S Cycle engineering on your 2018–2026 Harley Softail. Order your **S&S Cycle 50-State Superstreet 2-Into-1 Exhaust System** today with fast shipping!
