There is a minor difference...

The 2 tubes going into the 1 pipe are longer in the 85 and older rigs, while they come together almost immediately in the 86+ rigs. Not sure why, but give it a try...

"A young man who does not have what it takes to perform military service is not likely to have what it takes to make a living." - John F. Kennedy

Proud owner of an 88 Montero (with a blown engine).