S&S Cycle has built American V-twin performance parts in Viola, Wisconsin since 1958 — flywheels, carburetors, cams, cylinder heads and complete crate engines. When a Harley owner talks about a 124, a 128 or a 131 build, they are usually talking about S&S. Few names carry more weight with engine builders in this space.
Maximize the breathing capability of your 2017-2021 Harley-Davidson Milwaukee-Eight engine with the S&S Cycle Tuned Induction Air Cleaner. This high-performance system features dual high-flow cotton-media filter elements and laser-cut intake runners, engineered to deliver a significant increase in airflow over the factory unit. Experience improved throttle response and power with this bolt-on upgrade.
The S&S Cycle Tuned Induction Air Cleaner is more than just a filter; it's a complete airflow management system designed for 2017-2021 Harley-Davidson models. Its dual high-flow cotton-media filter elements provide twice the filtering surface area of the stock unit, ensuring cleaner air for your engine while maximizing volume. The heart of this system lies in its precisely tuned, laser-cut intake runners, which are engineered to increase airflow by a substantial 44 percent. This translates directly into more efficient combustion and improved engine performance across the RPM range. Plus, its CARB emissions-exempt design means it meets compliance standards.
Installation is a straightforward bolt-on process, utilizing factory air intake mounts. While the S&S Cycle Tuned Induction Air Cleaner offers significant airflow gains, a fuel/air recalibration is highly recommended. This ensures your engine's ECM can properly adapt to the increased air intake, optimizing performance, maintaining ideal air-fuel ratios, and preventing potential issues. This upgrade is perfect for riders looking for a performance edge without compromising on emissions compliance.
How much more airflow does this S&S intake provide compared to the factory unit?
S&S Cycle engineered this Tuned Induction Air Cleaner system to deliver a 44% increase in airflow compared to the factory intake unit on compatible Harley-Davidson models.
Do I need to retune my ECM after installing this air cleaner?
A fuel/air recalibration is highly recommended after installing this air cleaner. Optimizing your ECM tune will ensure you get the full performance benefits from the increased intake airflow and maintain proper engine operation.
Is this air cleaner legal for street use in all states?
Yes, this S&S Cycle Tuned Induction Air Cleaner has a CARB EO# D-355-55, making it emissions exempt and legal for street use in states that require CARB compliance.
| BRAND | S&S Cycle |
| TYPE | Air Intake Components |
| SKU | T14-664137 |
| WEIGHT | 4.5 lb |
Nearing 40k miles on my 2018 Road Glide I was concerned with some of the issues the stock M8 was having. Conveniently this kit fixes everything that I was worried about and has the added bonus of 30HP and 10TQ. The 475 cam really woke up my 107" and you can feel the increase in acceleration power through all the gears but especially over 70MPH.<br />- Wiz IOMC <8> IOFFIO
Great kit with just about everything you need. Plenty of online tutorials to make it quite simple. Took me about 6hrs from start to finish, and I did it all in my front yard
The kit is amazing, great quality and all parts needed for the job. Easily the best upgrade I?ve done to my bike. It?s exactly what the M8 needs to make it sound good. Would absolutely recommend.
The 475 cam really woke up my M8! More power and better sound the hardest thing to do ended up being removing and installing the exhaust. I highly recommend this.
Mostly bought this kit for the oil pump to avoid any problems with potential sumping issues but the old Harley battle cry “as long as we’re in there…” ruled in my case. Saw no downside to the 475 cam and wasn’t disappointed. New cam, cam plate, new lifters and adj pushrods, of course, and no warm fuzzies with the plastic lifter sleeves (not incl in this kit), so those went as well. No dyno to share as I went with a canned tune from FuelMoto on a DynoJet PowerVision and am autotuning. Butt dyno says good gains in hp and tq. Glad I did it. My only mild negative is that it wasn’t blasting me in the face that I needed a HD brand o-ring/gasket for the oil pump that they, for proprietary reasons, could not include. It may have been mentioned somewhere but I don’t recall seeing it. Not a big deal and certainly no reason to go elsewhere for a kit. This most excellent kit, except for said gasket, was otherwise all inclusive and I can’t recommend it too highly. Good job S&S. 2019 FLHXSE 117, oil cooled
Traded mpg for the power and chop from this cam. M8 107 dyno'd at 110hp 122tq.<br />2017 stock header, cat delete, x-over capped to 2-1, neighbor hater, k&n 63-1138
