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- In addition to improving fuel efficiency, the A7RTC spark plug also helps to improve the overall performance of your engine
a7rtc spark plug. By providing a reliable spark for ignition, this spark plug helps to ensure that your engine runs smoothly and efficiently. This can result in improved acceleration, better throttle response, and overall increased power output.

rotary shaft oil seal. It is important to choose a high-quality seal that is compatible with the requirements of the system to ensure optimal performance and longevity.
Metal O.D. wall type Ensures improved fitting retention between the seal O.D. and the housing bore.
used to replace the butyronitrile rubber with high temperature. Fluoro rubber is proved to have excellent oil

MH: O.D. wall is a rubber material
HM: O.D. wall is a metal case
MH(S)H: O.D. wall is metal with a reinforced inner metal case