I have not bought valve springs in years but i need to buy a set for a head swap coming up. The cam is the one in my sig and there will be some boost added if that makes a difference.

 

sounds dumb but im running ls-7 springs in my truck i was told there rated to .590 now idk if that would be cutting it too close but i havent had any issues with mine. and there quieter

 

Do you want single or dual valve springs?

For Single beehive I would go pac, brian tooley springs or psi.

For Dual springs, Pac, PSI, lunati gold for great price to performance ratio @ $225, Crane Springs are usually affordable too, or Manley springs.

 

I just bought some PSI single springs for my 220/.581 cam. I heard they were the next step above PAC

 

PAC seem to be the most common these days. I went with Brian Tooley dual springs, I'm fairly certain they are identical to Patriot duals and other duals you see around.

 

if i were to need new springs today, it would be pac.

 

Im runnin isky springs. 163A i think they are. Rated for .600"

Got a new set in the shop to put on when i pull the motor for new lifters and such.

 

Running Vinci dual springs on my truck.

 

Im running prc daul springs .650 lft for my boosted truck and pac 1218s for my ls1. I havent had an issue with either brand in the past.

 

Vinci/Crane duals here.