lol i actually made a post about these a few years back, heres the response i got
DeXteR wrote:
"20% better response" has absolutely nothing to do with engine performance. Get your critical thinking caps out...
The only things they can change on the pulley are weight (due to material) and ratio (how far you need to push the pedal to how much the throttle body opens).
How much differences is a couple of ounces going to make? As far as the force required to actually push the gas pedal - none whatsoever. The resistance in the pedal is mostly from the spring on the throttle body and then some friction in the cable. Those don't change at all with this new pulley so the actual pedal force is going to be 99% or more unchanged.
In the overall scheme of total weight reduction, you might save a few grams. Worth the money? You decide.
The only thing this little upgrade has to offer is changing the ratio between pedal travel and throttle body opening. Assuming this "20% better response" actually has some sort of meaning, I'm guessing you only have to push the pedal 80% as far to get to WOT compared to stock.
If that's true, you know what happens if you mash the throttle to the floor with too much force? You're going to snap the throttle cable. Unless you adjust the gas pedal to either stop going down once you reach WOT or adjust the cable and pedal such that the pedal is still at the floor at WOT, this isn't going to work.
In conclusion: rice.
That being said, I've never seen or used one of these things in my life. I could be a little off base, but this is just my opinions based on my experience and reasoning. Take it for what it's worth.
RJ, if you want to spiffy-up your engine bay, start by cleaning it. Then do some of the stuff Krash suggested.