Yo, I just swapped in some lightweight lug nuts and all four wheels, and man, I can really feel a difference. The increased acceleration is very noticeable. What, you don't believe that the car is that much faster? Why not? After all, I reduced inertia, so it must be much faster, right?

 

good point ( about FEELING THE DIFFERENCE - sarcasm is noted )but seriously, you may not feel the difference in lugnuts, but when youre trying to break ..say from 12.90 ( 1/4 mile ) into 12.80..any little adjustment is worthwhile.
also, you may laugh at your lugnut comparison, but shaving THAT much weight ( say 0.010 per lug ) in PISTON WEIGHT...you'd feel that difference wouldnt you? ( unless youve never had aftermarket pistons - regardless of what make / model )

im not trying to start anything - but youre statement shouldve read ( i forgot who wrote it ) : AS LONG AS THERE ARE GOOBERS OUT THERE THAT BELIEVE EVERY MAG ARTICLE AND ARE WILLING TO SHELL OUT A FORTUNE"....

 

Careful on ANY aftermarket crank pulley...

This pulley was NOT a (NST) pulley...

My pulley failed and I had to replace my crankshaft... Not fun and was not worth it.

P.S. This is before I had the Vortech on, it was on a stock NA block.

Here are a cpl pics.

 

that could happen w/ any product as well - the down side to modding.
be it cams / pistons...just out of curiosity - did you install the stock pulleys and take it back to the dealer? ( you know you thought about that! ) anything else besides the crank get harmed?