PROS: faster, more positive shifts, longer clutch and band life, elimination of excessive shift over lap, cooler running temperatures, better fuel economy, and lower your elapsed times at the drags
CONS: there isnt none. just enjoy it :smoking:
i got a B&M stage 2 shift kit and a trans cooler fitted to my vs calais 2 days a go and it was the best thing i have ever done to it. it so much betta to drive! it a must mod to do to any auto gearbox!
just one tip if you get a shift kit fit a trans cooler as well, get a new trans filter too and ask the guy that's going to fit it to install a drain plug to the bottom of the pan so if will be way... easier to drain old trans fluid later on when you do a service on the car
the roller rockers will give you more power but it wont be notable while driving but you will notice it on the dyno and don't run a to big of a cam as you will lose power bigger isn't always betta! talk to a good engine builder and tell him what you got done to your motor and he will give you a good cam to fit. best bet is to get a cam and cylinder head package with a memcal to match than get it dynoed to get the best out of it!
hope that helps