Overdrive Operating Piston Rings Austin Healey 53-62. New old stock overdrive operating piston rings Austin Healey 53-62 BN1 BN2 BN4 BN6 BN7 BT7 models with steel piston rings. Later models have steel rings. Original part number 17H5849 to 7H5860. Note late BN7 & BT7 used rubber O rings on pistons as fitted to BJ7 and BJ8 models.
Use steel piston rings to Laycock overdrive number 22/3009/60. Check your overdrive before ordering
Part 17H5849 and 7H5860. (six pieces per set) Alternate number for reference only 866-410 as they may not be equal to original quality
“Important these rings can only be fitted to original piston”
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