TH says...
....donut seal.The flange side on the cat should be
cleaned with emery cloth until its bright....clean the
flange the seal sits on before fitting it(wire
brush)...before fitting the seal use LOTS of copper
anti-sieze on the seal..but only on the spherical side
that mates onto the cat flange...brush it well
in....put some on the now clean cat flange and bolt
up...ALWAYS use the springs and correct fittings...the
seal MUST move as the engine/trans rolls...if not it
will 1)crack the new seal 2)crack weld in the system
3)Hellish NVH noise....
-'96 SE MTX 3L
-'98 SVT 1,173 of 6,535
-'05 Mazda 6s, loaded, g/f's ride
-Need a 96-00 manual on CD? PM or email me
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