[HannahWCU]

I have been doing alot of research on this modification. Some say it will increase mileage some say it wont. All say it will not pay for itself. But my question is this: I am having the timing belt replaced in my neon and the mechanic that is doing the work said he would install the underdrive pulley for free (if I bought it) since he has to pull the stock pulley to replace the timing belt. The pulley I am buying comes with replacement belts too.

My commute is 50miles each way (25,000miles/year), so even a small (1 MPG, 2.5%) fuel economy increase would be beneficial.

So, since the installation is free, and belts need to be replaced anyway, would you install the $130 underdrive pulley?