I've followed many of the previous threads regarding restrictive Cobra mufflers. I’ve decided to take a closer look at mine, not looking good. From the best I can tell, the inside opening is 2.25” at best. So here’s the question, has anyone used the Cobrapack mufflers on their car?
My 428 reads just 326 hp at the wheels, so would I opt for the 2 ˝” or 3” core?
I plan to use the “packed” version either way as it’s mostly street driven.
My concern is obviously an overall horsepower/noise balance. I have 20” bodies today and could stretch them to 22” or 24” if I went to a 3” core. That may slightly offset the noise difference between the two core options. But again, with the relatively small horsepower numbers is the 2 ˝” core enough.
Thoughts?
http://www.classicchambered.com/clas...cts.html#cobra