GZ25N14 / GZ25N23 Air Pipe (S) $2.50 Quantity discounts available QuantityPrice Quantity: -+ SKU: AV835 ABOUT THIS PRODUCT:GZ25N14 / GZ25N23 Air Pipe (S)AboutAboutAir pipe for GZ25N14 / GZ25N23 engine. PMW part # 4519. Zenoah part# 4810-16150