I am looking at super-tech or rev valve springs for my gsr turbo, max hp I will be makeing is 400. Any one have exsperience with these brands or maybe another brand I should try, any help would be apreciated.

 

it doesn't matter there all made in south america. dont get crazy with spring pressure for the street you dont need over 80lbs closed
I have manleys and the last time I rebuilt my head the pressure was really close to when they where new.

 

can't go wrong with either, but i'm using supertech

 

i had rev, a couple lost spring tension. i just bought supertech, so we'll see

 

Supertech

 

supertech ftmfw reving it till 10k with no problem