Pacesetter lt's
 

Hey have stock manifolds on my 01 z m6 have magnaflow exhaust but do I need to get a ory when I order myong tubes?? And where is the cheapest place to get pacesetter lt.'s thanks guys sorry I'm sure it's been asked a hundred times

Yes, you'll need a catted or ORY-pipe.
Start going down the list of sponsors I'm sure you'll find a good price.

Ordered my pacesetters longtubes with their ORY from speed inc a few years back. Was very happy with the quality and setup. Also had magnaflow.

Feel free to give us a call we are happy to get you into a header and ypipe package thats fits your budget.

Cheapest- BBK

Best bang for you buck and highest performing- Texas Speed

IMO Go with Texas Speed stainless. Not that much more and they are stainless.