Feuling, machined aluminium M8 cylinder head breathers

Made from forged 6061 aluminium, anodised red with squared surfaces, excellent umbrella valve sealing, longer main breather outlets with a double O-ring for improved sealing of the breather system. Correctly sized breather inlets and optimal positioning for efficient engine ventilation. Unique design that maximises breather volume and allows easy maintenance. The breather bodies have multiple drain ports located in the inner floor; the ports are chamfered on the ID for easy drainage, but squared at the outlets to prevent filling from splashed oil. The kits include: forged breather housings, forged covers, breather filter elements, umbrella valves and quality hardware.
Feuling cylinder head breathers function, seal and maintain engine vacuum. Tests on a healthy engine show 3-4 oz of oil in the crankcase, and removing the dipstick drains a further 3-4 oz.
Note: The factory OEM plastic breathers can be problematic; the material warps easily, especially after exposure to excessive heat, making it difficult for the internal umbrella valve to seal, causing oil carry-over. Another common problem with OEM breathers is broken or cracked outlets, caused by thermal warping or improper fitment and installation. This allows oil-laden air to bypass the stock breather.
Note: Feuling breathers work, seal and maintain engine vacuum. Tests on a healthy engine show 3-4 oz of oil in the crankcase and, on removing the dipstick, a further 3-4 oz drain out. Please note that this test can only be performed on a sealed engine, with no external venting through the dipstick or transmission top cover. The breathers can be used with external venting via the dipstick, transmission cover and air filter.
Note: See 707761 for the Feuling rocker cover rebuild kit, compatible with OEM and Feuling forged aluminium aftermarket breathers.


Specifications


Brand
Feuling


Application
17-25 M8 models (excl. 2025 Softail; 23-25 FLTRXSE; 24-25 FLTRXSTSE; 23-25 FLHXSE; 24-25 FLHX; 2025 FLHXU; 24-25 FLTRX); 17-25 Trikes


Sales unit
Kit


Packaging weight
0.23 kg


HS Code
87141090


Motorcycle family
SOFTAIL, TOURING, TRIKE


Original name
Feuling, billet head breathers M8