An important consideration when shopping
for a muffler is the exhaust flange. The manifold
mounting flange on the less expensive mufflers is
slightly undersize on the outside dimension. The flange
on the Aires muffler is exactly to specifications.
It is very large and is held very tightly when using
an original forged muffler clamp thus the clamp
makes a correct fit. The muffler does not come loose
nor does it leak.
Due to the wear and tear on the manifold
from vibration of loose mufflers and corrosion, we
recommend using a muffler sealer compound to make
the seal. This can be purchased at almost any auto
parts store. It is used to patch mufflers with holes
it has the consistency of tooth paste and should be
applied around the flange prior to installation against
Use a floor jack to hold the muffler
in place while attaching the muffler clamp.
The photo at left shows the four
vastly different flanges found on the four mufflers.