[jim_howard_pdx]

I believe you Dark_5.0. You can pick up huge time improvements with proper exhaust tuning. Read my speed secret number four thread and you will see exactly why it is happening.

I know you guys like to take hp and torque off a flywheel and say this gets you 10 horsepower. But honestly guys, its what you increase at the rear wheels that makes you faster. Adding a cobra intake on a perfectly stock engine makes 3 to 5 extra horsepower at the rear wheels, and about a tenth or so improvement in times because that extra torque goes across a higher rpm band that is meaningful to your et times. So if you are getting 10 to 12 horsepower you are doing other stuff too.

But hell, I usually make three changes all at one time too.