HASTINGS Replacement Piston Rings — 3.750" bore, standard – 07-11 Touring, 07-11 Softail, 07-13 Dyna

🔧 Replacement piston rings designed to restore compression and oil control for worn cylinders.

Top compression rings are barrel face to promote better heat transfer between the piston and cylinder wall and to control combustion gases so the piston can transfer energy to the crankshaft.

Second compression rings are Napier style; a reverse twist ring with a taper-machined ring face reproduces the OD bottom-side scraping edge of a positive-twist torsional ring to improve side sealing and reduce oil migration. 🛠️

Oil control rings are three-piece Flex Vent design, with rails manufactured for improved conformability to the bore and uniform pressure from four steel rails and two expanders for reliable oil control.

Made in the USA, includes enough rings for two pistons (unless noted), with two rings per groove except where rails use two rail rings per one expander ring. 🇺🇸