Head Breather Bolts - Doherty Style Polished KNurled
*Similar specs to Doherty Style Breathers - WCC Chopper Set ups *Reduces blow by oil mist *Decreases crankcase pressure *Stops gasket leaks *Equipped with umbrella valves, vents out and never back in *Will fit 93- and up EVO type Harley Davidson Motor Harley Davidson 1991 and up Sportster
Head Breather Bolts for Harley Davidson
Head Breather Kits with Velocity Stack and Choke Knob
Head Breather Bolts - Doherty Style Polished KNurled
*Similar specs to Doherty Style Breathers - WCC Chopper Set ups *Reduces blow by oil mist *Decreases crankcase pressure *Stops gasket leaks *Equipped with umbrella valves, vents out and never back in *Will fit 93- and up EVO type Harley Davidson Motor Harley Davidson 1991 and up Sportster
Head Breather Bolts for Harley Davidson
Head Breather Kits with Velocity Stack and Choke Knob

Speed Dealer Performance Head Breather Kits - Knurled Body

SD-BRE-KN-BK
  • Sale
  • $126.95
Shipping calculated at checkout.

Made In the USA By Speed Dealer Customs

Specs:

  • *Similar specs to Doherty Style Breathers - WCC Chopper Set ups
  • *Reduces blow by oil mist
  • *Decreases crankcase pressure
  • *Stops gasket leaks
  • *Equipped with umbrella valves, vents out and never back in
  • *Will fit 93- and up EVO type Harley Davidson Motor
  • Harley Davidson 1991 and up Sportster
  • Not for use with an S&S 117 motor. 

Kit Includes:
*2 6061 Aluminum Bodies to accept Viton "O" Rings
  (Bodies are Knurled)
*2 Machined 304 Stainless Steel Mounting Bolts -- 1/2-13 Thread included. 
*4 High Temperature Viton "O" Rings

Available in 2 Finishes:
* Black Anodized
* Polished

Notes:
Will not fit 98-01 Magneti Marelli Fuel Injection and '08 and later FLH models.

Breathers are equipped with 1/2-13 thread mounting bolts, if needed a 3/8-16 thread bolt is available but must be requested. Please send us a message or add a note to your cart.