how many catalytic convertors does a 1991 Mercury Grand Marquis have?

[ladyxtasy28]

I was told 4...but only the front were convertors and the ones in the back were called something else. Please help me

[sunpekes]

(4 )....2 in line on each side.

[smart@$$]

only one. even if it has duel exaust, it probably still has just one after the 'Y'. no vehicle has 'four'. the two in the back are mufflers.

[laydonsdad1]

If this is a V-8 engine it could have up to 6 on it.