Turk:
Shannon brings up a good fix, and once you have solved your mounts problem, may be the only way to go.
I originally ordered the Shelby headers and collectors, but was surprised that something so costly required the need to do so much fitting and welding and I returned them. Contacted Drew Serb for a set and was very pleased. The fit and finish was the finest I have ever seen, and the welding was superb.
You may not have that option now, as your sidepipe holes are cut, but next time.........
Bud
