Interested in comments from anyone knows about these things...
If you look at the 4.7 boxes they have a perforated tubes to allow exhaust to enter into the two chambers, When the valve is closed the exhaust is first forced into the smaller front chamber (from the front of the car pov) via...
I can't see these pictures if I'm looking at the forum via work infrastructure. OK if looking from home. Only for some posts as I can see most pics. Strangely I can often not see anything that @Guy posts regardless of how I'm browsing the forum (Work/home/mobile)
Eb
I'm following your investigations with interest! Chapeau!
Ideally a solution that could be turned on and off somehow, but I doubt that's possible starting with 4.2 back boxes.
I wonder what the tubis sounded like without the larini cats.
Eb
Following the youchube link about fixing the window regulator on a QP on another thread, the same person posted what his 4.2 QP sounds like with Larini cats an a tubi exhaust. Very nice!
Eb