spring kits for ls7 gm head's
 

any one using katech spring kit for ls7 gm heads..or is everyone useing patreiot springkit for upgraded springs...

Haans249 is using the Katech combo. He just fired it up and is planning on going to the dyno soon. I just sold another set today. These things are selling like hotcakes!

how much for the kit & what the differnce ..double spring vs single ???? any hp gain !!!!

$256/set for springs (68g)
$256/set for titanium retainers (5.5g)

100hp gain!




Just kidding. The single beehive spring is much lighter and performed better on our Optron valvetrain dynamics test cell. Lighter valvetrain = greater durability.

any in stock.??? have had it on the dyno for hrs ??? HAS THE KIT BEEN TO HE LL & BACK if so ..i'm in .... expert spring killer talking :jest: :jest:

I just got my PRC spring kit that I will be using on my LS7 heads. I didnt have the money to buy the Katech PSI combo. They look like a hard-to-beat combination.

Yea, I have them in stock. They have been on several engines on the dyno, one of which was our Camaro engine - 8 hours of durability. They have also been on the Optron.