Hi guys, I have a set of your ultimate duty valve springs, and I (actually my machinist) have some questions. What should the installed height be? What is the rate? Can they be used with stock spring seats? Is it ok to use stock retainers? I'm running a stroker, so ill only see 8k rpm.
Thanks in advance.

 

It is used with stock seats and stock retainers. Pressure is listed on our site;

http://www.maperformance.com/map-bee...p-evo-bsk.html

 

Installed height is 1.5"

 

Bahm!

 

Kicked my questions asses lol. Thanks everyone

 

No problem!