I am doing the dimples on all my intakes, now. I became a firm believer after dyno testing with different manifolds, vs stock out of the box. I added the dimples, and had a stock intake to do a back to back test on the same engine, same day, within minutes of each other. Made several dyno pulls to establish repeatability, and changed intakes, no other changes, and three more pulls to establish repeatability. The dimpled intake increased the overall torque and overall horsepower figures a definite measurable amount. So, I now add them. Lots of work, but cheap torque and horsepower in the long run. Joe-JDC