It is well known these are by far the best front springs available for street (and track) for your Datsun Roadster. Perfect height/stiffness compromise. Firm ride, but not harsh. 
 
Don't confuse these excellent high quality springs with unproven, pirated, bottom dollar copies!
 
Unmatched ride, stability and comfort when paired with Sport Touring or "Koni-Medium" calibrated Bilsteins.  
 
These are absolutely the best spring for street and vintage racing-hands down.  Cheap copies and "supercomp" springs don't compare. Those are a mistake!
 
See the combo deal for best pricing.  In stock for immediate shipping. 
 
These springs have decades of proven performance.   DRP always brings you the best!