JAMMER SLOTTED CRANKCASE FILTER KIT
Available exclusively from CSI, our Jammer slotted filter housing looks great and provides rigidity so the element doesn't distort or collapse with age. The gauze filter medium cleans up easily with soap and water and helps keep foreign material out of the bottom end. Ideal for custom builders or air cleaner installations that don't have breather fittings. Complete with chrome mounting bracket and hose clamp.Fits all Harley® models with 3/8" crankcase breather hose.

JAMMER® LEGENDS CRANKCASE BREATHER FILTER
This slotted crankcase filter from Jammer Cycle Products® looks great and helps keep foreign materials out of the bottom end. Slotted design matches other Jammer products. Includes filter, chrome bracket and hose clamp. Fits all Harley® models with 3/8" crankcase breather hose.

CRANKCASE BREATHER FILTER
This crankcase breather filter mounts easily, looks great and helps keep foreign material out of the bottom end. Especially helpful when installing custom air cleaners that don't have breather fittings. The deluxe model comes complete with chrome mounting bracket, filter assembly with chrome end cap and hose clamp.An economy filter with plain end cap is also available. Fits all Harley® models with 3/8" crankcase breather hose

Threaded Head Inserts
Permit the installation of aftermarket air cleaners and support brackets on 1992 Evolution® Big Twin models. Threaded 1/2"-13 on the outside to fit the head, with 5/16"-18 threads on the inside. Sold in pairs

Uni Filter® Crankcase Vent Filters
Feature a 'zip tie loop' for attaching them to the frame, eliminating loose hoses. The washable urethane material requires no oil or special cleaners, and can be washed in soap and water for years of service.

Big Twin Breather Valves
Original Equipment plastic breather valves for all Big Twin models 1970 to present.

RevTech Adjustable Breather Valves Permit the engine builder to alter breather timing to match the displacement of the motor. Increasing the stroke or cylinder bore changes the total volume of the crank-case. If the breather is not modified, the cylinders fight the pressure build-up in the lower end that a stock breather cannot relieve. RevTech® offers an all-steel breather valve for Big Twins 1948-early 1991. It's designed to replace the stock steel or plastic breather valve and with its removable gear, permits you to dial in the the exact timing needed to ensure proper scavenging. Comes complete with selection of four different sized thrust washers.

S & S Steel Breather Valves for Big Twins