Big Sucker™ Stage I Air Cleaner Kit – Natural Finish (Hidden Breather System)

High-Performance Hidden Breather Intake for Harley-Davidson Touring EFI Models (1999–2001)

The Big Sucker™ Stage I Air Cleaner Kit brings proven airflow performance and a clean, hose-free design to early-model Harley-Davidson Touring EFI bikes. Featuring hidden breather technology and a radius air inlet for smooth, unrestricted flow, this system maximizes engine breathing and torque response while eliminating the need for external hoses or hardware. Constructed with a one-piece aluminum backing plate and a synthetic, water-resistant filter, it’s built to deliver performance and durability in all conditions. Proudly Made in the USA, this kit maintains OEM cover compatibility while boosting both style and power.

⚠️ WARNING: Cancer and Reproductive Harm — www.P65Warnings.ca.gov
CARB Exempt: Per Executive Order (E.O.) #D-639-7 Exhibit A, for 2001–2019 EFI models.

Key Features

• Hidden breather system O-ringed at the heads and vented at the mouth of the injector/carb for efficient engine breathing
• Eliminates external hoses or hardware for a cleaner aesthetic
• Radius air inlet ensures smooth, unrestricted airflow for maximum performance
• One-piece aluminum backing plate integrates breather passages for strength and durability
• Synthetic, water-resistant filter provides superior airflow and all-weather protection
• Compatible with OEM air cleaner covers
• Includes all necessary hardware and installation instructions
• Made in the USA

Performance & Fitment

Perfect for Harley-Davidson Touring EFI models (1999–2001), including Road King, Electra Glide, and Road Glide, the Big Sucker™ Stage I Air Cleaner improves throttle response, airflow, and midrange torque while maintaining a factory-clean appearance. Ideal for Nowaskey Performance Touring builds and riders seeking reliable, maintenance-friendly performance without compromising style.

Compatible Models Include:

• Road King EFI (1999)
• Road King Classic, Electra Glide Classic, Ultra Classic, and Road Glide (1999–2001)

Model: Big Sucker™ Stage I
Design: Hidden Breather System
Material: Aluminum
Color/Finish: Natural (Silver Base)
Filter Media: Synthetic, Water Resistant
Shape: Round
Features: Compatible with OEM Air Cleaner Cover
Units: Kit
Weight: 2.56 lbs
Dimensions (L x W x H): 9.09" x 7.95" x 5.47"
Country of Origin: Made in the USA