Once again, DRP brings you the best U20 production valves you can buy.  Top Quality CNC  production manufactured.  
 
High performance U-20 valves. Swirl polished stainless.
 
Precision production machining surpasses the quality of all other U-20 Valves.  Far superior in every way to obsolete, overpriced=high profit Manley valves. 
 
Don't believe the BS webpage nonsense out there - those parts simply don't compare.
 
This is a set of 4 exhaust valves.
 
Money back if you don't agree these are superb - better than any other commercially produced valve.  We quarantee you'll be pleased!