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Accessories
- Custom Shift Linkage
- Dyna Beads
- Foot Peg Mounting Hardware
- Handle Bar Riser Kits
- Heel Rests & More
- Horn W/ Wiring Extension
- Spark Plug Wires
- Sportster Foot Peg Extension Kits
- Handlebars, Grips, Controls
- Foot Controls, Pedals, Extensions...
- Covers, Trim, Accents
- Tools & Supplies
- Skid Plates
Air Cleaner - Intake
- Air Cleaner Components
- Outlaw HiFlow 425 Air Cleaner Complete Systems
  - Sportster Model Air Cleaner Systems
  - Twin Cam Model Air Cleaner Systems
- Outlaw HiFlow 587 Air Cleaners Complete Systems
- Outlaw HiFlow 606 Air Cleaners - Complete Systems
- Outlaw HiFlow 636v Air Cleaner Complete Systems
- Optimized Air Cleaner Systems
  - Twin Cam Optimized Air Cleaner Systems
- Velocity Stack Intakes
  - Outlaw V-Stack Air Intake Complete Systems
    - Sportster Model V-Stack Systems
    - Twin Cam Model V-Stack Complete Systems
- Pro Billet Stage 1 Air Cleaners
- K&N Performance Intake Kits
Apparel - Gear - Jewelry
- Apparel
- Gear - Key Chains, Stickers, Catalogs, Koozies & More
- Biker Jewelry
Coil & Key Relocation
- Dyna Model Relocation Kits
- Softail Model Relocation Kits
- Sportster Model Relocation Kits
- Touring & Trike Coil Relocation Kit
EFI Tuners
- Power Vision Tuner & Accessories
- XiED - ViED Fuel Management
- Vance & Hines Flash Tuner
Electrical
- Batteries
  - Lithium-Ion Batteries
  - Stock Replacement Batteries (AGM)
- Lights
- Horns
Engine Upgrades
- Cool Down Your Ride
- Rocker Lockers
- Performance Clutches
Exhaust
- Thunder Torque Inserts
- Collectors, Tips & Accessories
- Slip-On Exhaust
- Full Exhaust Systems
- Exhaust Headers
  - Touring Models
  - M8 Touring Models
Footpegs
- Classic Pegs
- Outlaw, Trap & Knuckle Pegs
- Footpeg Mounting Hardware
Frame/Suspension
- Front Suspension
- Rear Shocks
- Harley Trike Lift Kits
- Other Components
- Shock Lowering Kits
- Solo Seat Systems
- Seats
- Struts
- Air Ride
- License Plate Relocation
- Speedometer Relocation Kits
- Front Pulley Sprocket Covers
- Fork Boots
- Chin Spoiler - Air Dam - Fairing
Gas Tank Lift Kits
- Sportster Tank Lift Kits
- Dyna Tank Lift Kits
- Softail Tank Lift Kits
- Touring Tank Lift Kits
- Deluxe Tank Lift Kit Option
- Split Tank Lift Kits - 1999 & Older Dyna Softail
GIFTS
Lubrication
- Oil Filter Relocation Kits
- Oil Coolers
- High Performance Oil Filters ~ K&N Filters
Special Packages
Stage I Kits
- Stage I Kits for Sportsters
  - Complete Stage I Upgrade Kits for 1991-2006 Harley Sportster (carbed)
  - Complete Stage I Upgrade Kits for 2007- Up Harley Sportster (EFI)
- Stage I Kits for Twin Cam
- Stage I Kits for Milwaukee-Eight
Tour-Pak Kits
NEW PRODUCTS
FAQ
- FAQ's On Speedometer Relocation Kits
- Frequently Asked Questions
Reports
- How to Set Your Bike up for YOU...The Comfort Triangle
- Milwaukee-Eight - Dyno Charts & other Interesting Info
- DK Custom Front Suspension Testing Report - Part I of II
- DK Custom Front Suspension Testing Report - Part II of II
- Differences Between Outlaw HiFlow Air Cleaner Systems
- Overview of EFI Options..XiED, Piggy-Back, Flash Tuners, Dyno ..
- Why & How to Cool Down the Twin Cam & Milwaukee-Eight Engines - Part I
- Why & How to Cool Down Your Twin Cam & Milwaukee-Eight Engines - Part II
- Overview of Stage I Upgrades
- Overview of External Breather Systems (EBS)
- Choosing the Right Size Thunder Torque Inserts
- Overview of Performance Rear Shocks
- Review of the 2018 Softails with New Frame and M8 Engine
- Harley Exhaust- How it Works - Myths and Facts
- Sleeper Performance Mods
- Trike Rear Axle Bearing Retainer Plates and why you need them
5th Annual IBC
- Sportster Entries
- Dyna Entries
- Softail Entries
- Touring Entries
- Trike Entries
- Open Class Entries
- See All Submissions
- Submit Your Photo

Breather Systems

91-UP SPORTSTER & BIG TWIN EVO

All Twin Cam & Milwaukee-Eight Engines

Breather Systems

Community Poll

Which Harley Do You Ride?

Street
V-Rod
Sportster
Dyna
Softail
M8 Softail
Touring
Harley Trike
I don't ride a Harley :(

DK Custom Products

Breather Systems