Description
+0.060″ oversized version of the standard component.
STANDARD BORE 2.7805″
1275 A+ ENGINES
3MM OIL RING WITH COMPRESSION RING SIZE .0591″ (1.5MM) AND ONE PIECE OIL RING .1181″ (3MM) ON P21253 PISTONS GIVING 9.7CR ON 1275CC STD RING SIZE
ROVER PISTON HIGH COMPRESSION 21963 AND AE REPLACEMENT WAS 21253 AND THE LATEST NUMBER FOR AE NURAL IS 87-524100
PLEASE CHECK YOUR PISTON SIZING AS 21962 SEEMS TO BE STAMPED ON SOME PISTONS FROM METROS OR OVERSEAS CARS
HIGH COMPRESSION VERSION IS IDENTIFIED BY THE LOWER OIL RING BEING 3MM WIDE AND THE TOP RING GAP TO THE CROWN IS 10MM DEEP.
THE LOW COMPRESSION VERSION HAS 4MM OIL RING AND A SHORTER LENGTH TOP RING GAP OF ABOUT 7MM TO THE CROWN/TOP.
THE GUDGEON PIN IS MOVED ON PRODUCTION TO GIVE THE HIGHER COMPRESSION RATIO AND LOWERING THE RINGS GIVING A LARGER TOP RING LAND FOR STRENGTH
+.020, +.030, +.040 AND +.60 ALSO AVAILABLE
PLEASE NOTE PHOTOS ARE FOR ILLUSTRATION ONLY
DUE TO A VARYING SUPPLIERS WE MAY SUPPLY GRANT / HASTINGS OR COUNTRY RING SETS DEPENDING ON AVAILABLE STOCK.
THESE MAY BE SUPPLIED IN SINGLE OR 3 PIECE OIL CONTROL RINGS, PLEASE CONTACT US BEFORE BUYING TO UNSURE WE CURRENTLY HAVE THE TYPE YOU REQUIRE IF THIS IS IMPORTANT TO YOU.
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