So if i put RR on my car, I should replace my valve springs? Why is that? (im just curious, cuz i asked my friend who works at a pontiac dealership and he said i shouldn't have too, if i put a cam in then i could understand) when i had my heads cleaned up about 8 mo. ago they guy told me they were still good,


Mods
K&N intake
Borla Exhaust
170* stat
ported and descreended MAFS
TB bypass
BBK shorty headers
SLP fan switch
Air foil
MSD super conductors
Getting LT4 KM tomarrow!!

 

RR of the same ratio-no problem. If you increase the ratio, then you need to consider the springs to make sure you don't have coil bind.