Once again, DRP brings you the best U20 production valves you can buy.  Top Quality CNC  production manufactured.  
 
Standard U-20 valve diameters with high temp, high performance oxide coating.
 
Precision USA production machining surpasses the quality of all other U-20 Valves.  Far superior  in every way to obsolete, overpriced=high profit  Manley valves. 
 
This is a set of 8. 
 
Money back if you don't agree these are superb - We guarantee you'll be pleased!