Thanks, but I knew all of that. I've been crushing cans since 1982 on the TB inj stuff, porting and boring them too. My first GN in 87, I crushed the can, ported the elbow, ported the TB and plenum upper, deleted the cat, made the wastegate rod adjustable and ran 15 lbs, removed the second screen in the MAF , all in the second week I owned it!
Tires weren't good then, and in a forced downshift, it would go sideways at 50 mph.
As to the stock volume, I was just wondering.
TIMINATOR