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4.165" Bore 5/64"-3/16" Moly standard fit piston rings.

FMP E243K40
Limited Supply: only 5 remaining
Pricing: $50.84


Speed Pro Rings-4.165" Bore 5/64"-3/16" Moly 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.


  •         Fits 377/400 
  •          Ring Configuration 5/64”; 3/16”
  •         Available in Std; 30; 40; 60 bore sizes


  • FMP E243K40
  • FMP E243K40
  • Speed Pro
  • Available
  • New


Shipping Information

  • Item Requires Shipping
  • 2.0 lbs.
  • W3.0000” x H1.0000” x L5.0000”

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