How well does an older Hooker exhaust flow?

[TWISTER]

I would like to keep my exhaust capped up while racing and have a 12 year old Hooker exhaust on that is still perfect. Just wondered if there is any performance loss here over a newer design or if it is OK on a mid 11 sec car. Thanks I think it had the better mufflers on it. Super Comp sounds familiar

 

[bison]

I ran through an old hooker exhaust on the dyno last week. It didnt do much opening the exhaust. If your at mid 11's i wouldnt worry about it at all.

 

[turbonatr]

Been in the 10s through my Hooker cat-back exhaust.