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4.155" Bore 5/64"-3/16" Cast Standard fit piston rings.

FMP E243X30
Limited Supply: only 5 remaining
Pricing: $37.77


Speed Pro Rings-4.155" 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.


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


  • FMP E243X30
  • FMP E243X30
  • Speed Pro
  • Available
  • New


Shipping Information

  • Item Requires Shipping
  • 2.0 lbs.
  • W5.0000” x H1.0000” x L7.0000”

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