4.30" Bore 5/64"-3/16" Cast standard fit piston rings.

Speed Pro Piston Rings-4.030" Bore 5/64"-3/16" Cast standard fit piston rings

Speed Pro Piston rings dominate the racing industry with technically advanced design; dedicated research; and superior quality. Speed Pro rings deliver superior performance under grueling race conditions every weekend; on oval tracks; and drag strips world wide.

•          350/383
•          Ring Material 5/64”; 3/16”
•          Std; 20; 30; 40; 60