Quote:

Quote:

Thanks for the info, but the car picked up when I went to a custom made 2" header. Primaries are 38 and collectors are 3 1/2.



The tube size quoted may be ID not OD, if so you may be closer than you think.



Tubing is always OD
EDIT
A primary dia of 2.58 and a collector of 5"... most
big blocks dont even go that big and this is a 422"
small block that makes peak power at 6800

Last edited by MR_P_BODY; 05/26/10 09:32 PM.