ENGINE BREATHER TANK
These cast aluminium catch tanks use the same Uni Filter Breather Filters that our Crank Case Breather Kits use, but provide a vessel to catch any residue that may be present. Complete with a fluid level sight glass it is simple to see when they require emptying. For use with our Shorty Airbox Eliminator, Fastback Starter Cover, or when the airbox is removed on a post 1979 BMW Airhead boxer. These require the standard BMW breather hoses that were used with the square airfilter style air boxes. - Either BMW part #11 15 1 337 258 (Long type for R80/100 1981 onwards with forward breather) or 11 15 1 337 257 (Short type from R45/65 1981 onwards with rearward breather). We do not stock these hoses but they are available through genuine parts suppliers and are retrofitable. The alloy tank is fitted with the top two gearbox bolts and the breather hose fits into it. Uni Filter's breathers are made of a washable urethane which needs no oil or special cleaners.Please note that this may not suit higher mileage or worn engines as they will emit some oil residue and may require a catch bottle or tray.