BAJA DDM ZERO DRAG TEFLON SEALS TO SUIT MOTOR CRANKSHAFTS Set of two (2) high performance precision-machined teflon crankshaft seal inserts from Allanach Racing. One of the key ways to improve engine performance is to reduce internal friction and drag wherever possible. These inserts help the stock rubber crankshaft seals reduce their "death grip" on the crankshaft, while still preventing all air and mixture leakage. Fits Zenoah G23LH / G2D / G230RC / G260RC / G231PUH / G260PUH / G260PU / G231PUM / G260PUM / GZ25N14 / GZ25N23 / G43L engines. Also fits Chung Yang CY23RC / CY26RC / CY27RC / CY29RC / GP290 engines.