My best quarter mile time is 12.8 @112 with a 2.1 60' on street tires. I've tried searching to find out what kind of improvements to expect with a drag radial, but I've seen mixed reviews such as 1.6 - 1.8 60' times and other people said it would kill your trap speed because the tire is 1.5 inches taller. Any other opinions out there on what it will actually do for my quarter mile? I'm mostly asking because I want to put my friend in his place with his worked Monte Carlo SS who currently runs 12.6's. Thanks!