S&S Cycle Performance Softail Parts
S&S Cycle Performance Parts for Harley-Davidson Softail models include high-performance camshafts, intake systems, and exhaust components specifically engineered for Milwaukee-Eight (M8) engines. Designed to fit 2018-later Softails, these American-made upgrades deliver massive gains in horsepower and torque, improved throttle response, and a legendary V-Twin sound. Whether you’re after a bolt-in power boost or a complete engine transformation, these parts offer the ultimate blend of reliability and “Proven Performance.”
S&S Cycle, Their History Of Proven Performance
When it comes to V-Twin performance, there is one name that sits at the top of the mountain: S&S Cycle. For over 65 years, the crew from Viola, Wisconsin, has been obsessed with one thing, making Harley-Davidsons go faster and last longer.
From their legendary High-Performance Engines, to Camshafts, Exhaust Systems, Air Cleaners, and everything inbetween, S&S has earned its “Industry Legend” status through a relentless commitment to “Proven Performance.” They don’t just build parts; they engineer solutions that have defined the American custom motorcycle scene since 1958.
When you choose S&S for your Softail, you aren’t just buying a component; you’re investing in decades of racing heritage and master-grade engineering that you can feel every time you crack the throttle.
S&S Cycle Qualifier 2-into-1 Exhaust
The S&S Cycle 2-into-1 Qualifier Exhaust is a proper performance-style system — stepped headers, strong scavenging, and it’s designed to boost power and keep serious ground clearance (because scraping pipes isn’t a personality trait).
If you’re on a 2018+ Softail and want that “race-inspired” feel without the fluff, the S&S Cycle Qualifier 2-into-1 is absolutely worth a look.
✅ Fits: Softail 2018-up (non-240 rear tyre models)
S&S Cycle Qualifier 2-into-1 Exhaust — #SS550-1106
S&S Cycle Premium 55mm CNC-Ported Performance Intake Manifold
Think of your intake manifold like the hallway your air/fuel mix has to sprint through. The stock one works… but it’s built for “good enough,” not “let it eat.”
The S&S Cycle Premium 55mm CNC-ported intake manifold is designed to increase intake velocity and help fuel disperse and atomise better. The result is improved flow and efficiency, and it becomes a proper foundation piece when you’re trying to get the most out of your M8 combo.
Fits: Softail 2018–2024 Fits: Most Touring 2017–2024
S&S Cycle 55mm Intake Manifold — #SS160-0276
S&S Cycle Rocker Box Breathers
OEM breathers are plastic in a hot, oily environment. You don’t have to be a mechanic to see how that ends.
These S&S Cycle Billet Head Breathers are made from billet aluminium, so the “science” is pretty simple: tougher, more stable, and built to last. S&S Cycle also uses a dual O-ring design to get a better seal in the heads, which helps reduce leaks and that annoying oily mist that ends up cycling through the intake.
Translation? Your motor stays cleaner, and you’re generally burning less oil over time — which is never a bad thing.
Fits: Touring 2017–2024 + Softail 2018–2024
S&S Cycle Rocker Box / Head Breathers — #SS900-1186
S&S Cycle HPT496 Chain Drive Camshaft
Ever feel like your Milwaukee-Eight is this close to being properly angry… but it just isn’t quite there yet?
If you want a legit “whoa… that’s different” upgrade, the S&S Cycle HPT496 Chain Drive Cam for Milwaukee-Eight 2017-up is exactly that. It’s built for strong horsepower and torque gains without turning your whole bike into a full-on science project.
The best part? The S&S Cycle HPT496 plays really nicely with stock valves and springs, so you’re not automatically signing up for head work. It’s a seriously solid cam choice that wakes up pretty much any M8 and makes the bike feel sharper everywhere you actually ride it.
S&S Cycle HPT496 — #SS330-0821
S&S Cycle Stealth Air Cleaner Kit with High Flow Element.
If you’re chasing that cleaner, crisper feel when you crack the throttle… this one’s a ripper.
The big win with the S&S Cycle Stealth Air Cleaner over the OEM unit is simple: more filter area and a smoother inlet design, so the motor isn’t fighting for air.
The backplate is a high-strength polymer that helps reduce heat transfer into the intake charge (cooler air is happy air), and the filter element is washable, so it’s a proper long-term setup.
S&S Cycle Stealth Air Cleaner Kit — #SS170-0354A
S&S Cycle Billet Fuel Rail Kit
This S&S Cycle Billet Fuel Rail Kit is a 6061 billet aluminium unit that’s made as a direct replacement for the weak OEM plastic piece, no drama.
So instead of relying on something that can crack and leak once the heat and pressure start doing their thing, you’re running a fuel rail that’s actually built for performance use.
It also has more fuel capacity, which helps dampen fuel pulses and support increased fuel flow — handy when you’re stacking other airflow and cam upgrades.
✅ Fits: Softail 2018–2024
S&S Cycle Billet Fuel Rail Kit — #SS160-0287
Frequently Asked Questions About S&S CYCLE Performance Parts:
2. Will S&S Billet Head Breathers fix the oil dripping from my air cleaner? Yes, they are designed specifically to solve this common M8 issue. The stock plastic breathers can warp and allow oil mist to bypass the system, eventually dripping out of your air filter. The S&S Billet Head Breathers use a dual O-ring design and a unique labyrinth system to trap oil and separate it from the air, keeping your intake clean and your filter dry.
3. Is the S&S 55mm Intake Manifold worth it for a stock or Stage 2 engine? Absolutely. The stock M8 manifold is made of plastic, which can warp under heat and restrict airflow. The S&S Cycle Premium 55mm Manifold is CNC-ported aluminium, so it won’t warp, and its improved shape increases air velocity. Even on a stock engine, it provides a better foundation for flow; on a Stage 2 (Cam) bike, it ensures you aren’t bottling up the power you just paid for.
4. How loud is the S&S Qualifier 2-into-1 Exhaust? The S&S Qualifier is designed for a deep, race-inspired performance tone rather than just being “ear-splitting” loud. It is significantly more aggressive than stock but maintains a refined quality. It’s built for riders who want to hear the power without the tinny rasp of cheaper pipes.
5. Do I need a rain sock for the S&S Air Stinger Stealth Air Cleaner? If you run an open-face cover, yes. While the S&S Stealth Air Cleaner uses a high-flow pleated element that is durable, heavy rain can saturate it. S&S offers a specific “Pre-Filter” (Rain Sock) that repels water while still letting air through, which is highly recommended for all-weather riders.
6. Why should I upgrade to an S&S Billet Fuel Rail? Durability and flow. The OEM fuel rail is plastic and prone to cracking over time or under the stress of performance riding. The S&S Billet Fuel Rail is made from 6061 aluminium, so it won’t crack. It also holds more fuel volume, which helps dampen the “pulses” in the fuel line, ensuring your injectors get a steady, consistent feed at high RPM.
7. Does the S&S Qualifier Exhaust scrape in corners? S&S Cycle specifically engineered the Qualifier 2-into-1 with ground clearance in mind. The header pipes are tucked tight to the frame to allow for aggressive lean angles on Softail models. If you like to ride your Softail hard in the twisties, this is one of the best exhaust options available.
8. Will the S&S 55mm Manifold fit my stock throttle body? Yes. The S&S Premium 55mm Manifold is designed to fit directly with the stock Milwaukee-Eight throttle body. It allows you to remove the bottleneck of the stock plastic manifold without needing to buy a larger, expensive aftermarket throttle body for most street builds.
9. Do I need a Dyno tune after installing these S&S parts? Yes. Whenever you change airflow significantly—like adding the HPT496 Cam, Qualifier Exhaust, or Stealth Air Cleaner—you change the engine’s air/fuel ratio. To get the performance gains promised and ensure your engine runs safely (not too lean), a proper Dyno tune or a re-map with a high-quality tuner is essential.
10. Do these S&S Cycle parts fit the new 2024 Softail models? Most of them do, but fitment can vary by specific model. For example, the S&S Head Breathers fit Softails up to 2024, and the Qualifier exhaust fits 2018-up Softails (excluding wide-tire models like the Breakout/Fat Boy). Always check the specific fitment notes on the Rollies product page or call our team on (07) 3252 5381 to confirm before ordering.
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