99blkt/a

With stock manifolds will i pick up anything with an off road y, also will it increase the volume of my exhaust any ?

blue2000Z28

well i dont know because i did myn with the Lt's. Just bet both, they come in a package for a pretty good price..

LS1LT1

iTrader: (16)

Yes you will gain some with 'cat bypass' pipes such as the Mufflex types or an entire 'manifold to 'I' pipe' off road Y such as the Mac or Bassani set ups.
But it won't be header + ORY level gains at all.
I'd considered that as well at one point but true headers (mid lengths or long tubes) are the only way to go.