... OEM,ODM available ISO9001,SGS,ROHS Lead time:30 Day engine seal1)Applicable material:Silicone,NR,NBR,SBR,EPDM,CR,TPE ... know we can dynamically balance your engine pieces, or 3 mm your rotors, or CNC Dowel pin your engine to closer tolerances than most ... help you modify your enigine for race tolerances and performance. engine seal ring 5mm rubber gasket