Yall can look at my sig,I have just a couple simple questions. What experiences have you guys encountered with a 4K kit, positive and negative? And would I feel a nice power gain? Anyone know what kind of HP can be gained ? thanks, sorry for bringing up such a worn topic. I have been trying to decide if I should do this since my truck was stock, will be my last upgrade If i do it.

 

I think you will be happy with the 4k springs I know it really woke mine up and you have a bigger better turbo than me and a built auto tranny which with more rpms should really run go for it my 0.2

 

if you install 4k springs like i did and have 0 plate or no plate which is the same thing, its gonna feel like you added 50-75hp but really the springs don't add horsepower, they just extend your fueling to 4k so that way your truck especially with no plate won't defuel untill you let out of it. they really do wake things up tho, and your truck will sound bad *** once you rev it past 2500 at wot, i know mine did with my 6" turnout, and now it does even more with my 6" bullydog exhaust.

 

thanks for the help

 

if you have the head work done/studs or rings. a little bump in timing really helps in the higher rpm's. maby 17*

 

actually, 4k springs will increase bottom end fueling over stock springs

 

you can get away with 16* timing on a stock HG and add in the gsk... alot more fun with a wider rpm range and the timing will help fuel mileage as well as upper rpm power.