Set of two (2) high performance precision-machined, honed brass crankshaft seal inserts from HRS. 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. Several years of testing in RC applications has shown a typical performance gains of ~.2 HP and ~300 useable RPMs. Improves performance throughout the RPM range. Click here for installation instructions.
Will Fit Zenoah G23LH G2D G230RC G260RC G231PUH G260PUH G260PU G231PUM G260PUM GZ25N14 GZ25N23 G43L engines.
Chung Yang CY23RC CY26RC CY27RC CY29RC GP290 engines
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