Correct. '85 used two different styles of Y-pipe. The 4V style had a single light-off catalyst on the passenger
side, the CFI style has no pre-cat. And the main catalyst is also different for each. It's the same basic catalyst,
but the angle of the H-pipe end is different between the two, and 4V uses a flange, while CFI uses a slip joint
and clamp.
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