Set of 16 rings for four cylinder Oliver model 66 with all 1/8" compression" ring grooves and with 1/4" oil grooves.  This set contains 12 compression rings and 4 oil rings.   Check your pistons to see if you need standard 3 5/16" diameter over size before you order.   This set is for the factory bore diameter with four ring pistons. There are three compression rings and one oil ring on each piston.      If you have the 5 ring pistons you may have a older piston set and need the 5 ring set for the 60 here on Ebay.   Your cylinder bore must be 3 5/16" for these to fit.      Fits 66 gas and diesel, 66HC and 166D IND  models.  If you have a Super 66 these rings are most likely for a 3 1/2" bore and these rings will not fit.


This first quality  made in USA Piston Ring set for 6 cylinder engines includes piston rings for both cylinders.

This set fits the same as the Hastings set # 7781.   This set uses all cast iron rings for a fast break in time and minimal cylinder wear.

Be sure to check your bore diameter and ring widths in your ring pack before ordering.  


If all of the compression rings on each piston are 1/8" wide and the oil rings are 1/4" wide this is the correct 3 5/16" set.

 We also have piston rings available for most any application, car, truck, tractor, moped, scooter, cycle, modern or antique.

Shipped from 21914 in USA.  Most shipments go out the same or next day by USPS.   If you purchase late Friday we usually get it out in Saturdays mail.   We know that you have equipment down and want to get the parts as soon as possible.    We try to treat customers the way we would like to be treated if we were the buyers.