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RB Products Rear Cover O-ring fits .21 LS 20x1.0mm (5)
RBC01187-5
Pack of 5 Precision fuel-resistant rubber O-ring (RBC01187, 20x1.0mm) for RB Products .21cc long stroke RC nitro engine rear cover, ensuring airtight crankcase sealing to maintain compression and prevent leaks under high-RPM racing conditions.
Seal your .21cc long stroke nitro RB or Novarossi engine's rear cover with the genuine O-ring (RBC01187, 20x1.0mm), molded from durable nitrile rubber for superior fuel and heat resistance up to 150°C. This precision-fit seal prevents blow-by, oil seepage, and pressure loss, ensuring consistent power and throttle response during aggressive laps. Essential for post-run rebuilds; easy installation restores factory compression. Stock up for reliable performance and peak efficiency in ROAR/IFMAR competition.
