Originally Posted by Elvis13
They wait until 500 HP to go to 3" exhaust? I had a family member that ran a 460 in the pulls and he said his truck was night and day when he switched up to 3".
That list isn't gospel for every configuration. There's hundreds of different combos that work. It's just a good reference. Your family member probably spun up at 6500 rpm for the duration of a pull amd the engine was probably built for high rpm only. That would be the difference between a puller and a wheeler or muscle car.