This is a Harley-Davidson Ironhead Piston Ring Set with Parkerized Compression Rings
- For 3-3/16″ Bore
- Parkerized Compression Rings
- 1000cc
- Compatible with Ironhead Sportsters 1972 and later
- This Parkerized set when best for re-ringing
- P17551R HD 22355-72
- P17551R+010 HD 22357-72
- P17551R+020 HD 22358-72
- P17551R+030 HD 22359-72
- P17551R+040 HD 22360-72
- P17551R+050 HD 22361-72
- P17551R+060 HD 22362-72
- P17551R+070 HD 22363-72





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