SLOT21 – Lightweight Carbon-Fiber Intake System for M8 Harley-Davidson Softail
Clean your build and boost performance with the SLOT21 custom intake system, purpose-built for Milwaukee‑8 Softails. This carbon-fiber composite intake features a 21‑slot face that breathes from all sides, providing efficient airflow in a sleek, compact design. It replaces the bulky OEM intake with a more forgiving setup that won’t interfere with your knees or tank bags.
Internally routed for oil circulation and utilizing the proven KM‑378 air filter, it offers both performance and durability. The system bolts right on using new gaskets and hardware supplied in the kit. Whether you're building a Street Bob, Heritage Classic, or Fat Bob, this universal-fit intake is both stylish and functional.
Specifications:
Material: Carbon-fiber composite with internal oil passages
Face Design: 21-slot multidirectional airflow
Filter Compatibility: Uses KM‑378 reusable air filter
Includes: Gaskets and hardware for installation
Mounting: Bolt-on, OEM backplate compatibility
Finish: Matte carbon fiber texture
Country of Manufacture: USA (assembled in Houston)
Clean your build and boost performance with the SLOT21 custom intake system, purpose-built for Milwaukee‑8 Softails. This carbon-fiber composite intake features a 21‑slot face that breathes from all sides, providing efficient airflow in a sleek, compact design. It replaces the bulky OEM intake with a more forgiving setup that won’t interfere with your knees or tank bags.
Internally routed for oil circulation and utilizing the proven KM‑378 air filter, it offers both performance and durability. The system bolts right on using new gaskets and hardware supplied in the kit. Whether you're building a Street Bob, Heritage Classic, or Fat Bob, this universal-fit intake is both stylish and functional.
Specifications:
Material: Carbon-fiber composite with internal oil passages
Face Design: 21-slot multidirectional airflow
Filter Compatibility: Uses KM‑378 reusable air filter
Includes: Gaskets and hardware for installation
Mounting: Bolt-on, OEM backplate compatibility
Finish: Matte carbon fiber texture
Country of Manufacture: USA (assembled in Houston)
Clean your build and boost performance with the SLOT21 custom intake system, purpose-built for Milwaukee‑8 Softails. This carbon-fiber composite intake features a 21‑slot face that breathes from all sides, providing efficient airflow in a sleek, compact design. It replaces the bulky OEM intake with a more forgiving setup that won’t interfere with your knees or tank bags.
Internally routed for oil circulation and utilizing the proven KM‑378 air filter, it offers both performance and durability. The system bolts right on using new gaskets and hardware supplied in the kit. Whether you're building a Street Bob, Heritage Classic, or Fat Bob, this universal-fit intake is both stylish and functional.
Specifications:
Material: Carbon-fiber composite with internal oil passages
Face Design: 21-slot multidirectional airflow
Filter Compatibility: Uses KM‑378 reusable air filter
Includes: Gaskets and hardware for installation
Mounting: Bolt-on, OEM backplate compatibility
Finish: Matte carbon fiber texture
Country of Manufacture: USA (assembled in Houston)
Fitment:
Designed for Milwaukee‑8 Softail models (2018+):
Heritage Classic 114 FLHCS (2020–2024)
Heritage Classic FLHC (2018–2021)
Breakout FXBR (2018–2019)
Deluxe FLDE (2018–2020)
Fat Bob FXFB (2018–2019)
Fat Boy FLFB (2018–2019)
FXDR 114 FXDRS (2019–2020)
Low Rider FXLR (2018–2020)
Slim FLSL (2018–2021)
Street Bob FXBB (2018–2020)
Street Bob 114 FXBBS (2021–2024)
Standard FXST (2020–2024)
Sport Glide FLSB (2018–2024)
Why Choose the SLOT21?
Optimum airflow through 21-slot carbon face while maintaining a minimal profile
Compact design won’t interfere with rider ergonomics or tank accessories
Durable composite intake includes internal oil channels for longevity
Uses reusable KM‑378 filter for easy maintenance and performance
Full bolt-on kit with gaskets, hardware for fast, clean install
Custom intake system tailored for Harley-Davidson Softail M8 platform
FAQs:
Q: Will the SLOT21 fit my 2019 Heritage Classic 114?
A: Yes, it is specifically designed to fit Milwaukee‑8 Softail models from 2018 onward, including your Heritage Classic.
Q: Can I use my own air filter with this intake?
A: The SLOT21 is designed for the KM‑378 replacement air filter. Other filters may not fit or seal correctly.
Q: Is it difficult to install?
A: Not at all. It bolts directly onto your existing backplate using the supplied gaskets and hardware—no extra mods needed.
Q: Does it improve airflow and performance?
A: The multidirectional 21-slot design optimizes airflow over the restrictive stock setup, enhancing throttle response and engine breathing.
Q: Does it come with an oil pass-through system?
A: Yes, internal oil passageways are built into the intake for proper lubrication and internal component longevity.