K&N HD-1388 High-Flow Air Filter for Harley-Davidson Touring /Softail/Dyna 99-25

Vehicle Fitment

• Harley-Davidson Touring (Electra Glide, Road Glide, Street Glide) - 1999-2025 (all trims)
• Harley-Davidson Softail (Fat Boy, Heritage Classic, Deluxe) - 1999-2025 (all trims)
• Harley-Davidson Dyna (Street Bob, Low Rider, Super Glide) - 1999-2017 (all trims)

Fitment Notes

• Direct replacement for OEM air filter - no modifications required
• Compatible with factory airbox and select aftermarket intake kits designed for HD-1388

Features

• High-flow cotton-gauze media improves airflow and throttle response over stock filters
• Pleated design maximizes filtration surface for long service intervals
• Multi-layer cotton gauze with protective mesh ensures excellent dust and debris filtration
• Pre-oiled, washable, and reusable - reduces maintenance costs
• Custom base seal provides secure, leak-free fit in OEM airbox
• Enhanced engine protection without sacrificing performance
• Durable construction for long-lasting reliability
• Backed by K&N's limited warranty for quality assurance

Specifications

• Filter Media: Cotton gauze with aluminum mesh
• Shape: Oval / Panel air filter
• Height (Thickness): 2 in (51 mm)
• Length: 10 in (254 mm)
• Width: 6.5 in (165 mm)
• Weight: ~1.3 lb (0.59 kg)
• Pre-oil Refill Amount: 0.5 oz (15 ml)
• Washable & reusable: Yes

Included Components

• 1x K&N High-Flow Air Filter (pre-oiled and ready to install)

Product Description

The K&N HD-1388 is a high-flow, washable, and reusable air filter designed for Harley-Davidson Touring, Softail, and Dyna motorcycles. Its pleated cotton-gauze media enhances airflow over stock filters, improving throttle response, horsepower, and torque while providing excellent protection against dust and debris.

Installation is straightforward - HD-1388 fits directly into the OEM airbox with a precision base seal, requiring no modifications. Its durable, reusable design reduces long-term maintenance costs, making it an ideal performance upgrade for riders seeking improved airflow, engine protection, and lasting reliability.