Fenderwell Headers

Every brand would be a bit different, so no universal template is possible.

What works for us is:

Install the headers temporarily
(one side at a time)
w/the fenderwell removed.

Measure the area's axis of the tubes path
-----------at the point --------------
they would've passed thru the fenderwells.

How do you do that? With a temporary cardboard fenderwell.

Transpose those measurements to your fenderwell & cut from the center outward., keeping it as small as possible via several test-fittings.

Little bit of extra work, little bit of extra time,
but the neat tight fenderwell opening is worth it.

There are other ways to the same goal, but that's how we've do it.---8)