Rustbucket2

A friend of mine, is changing the crossover pipe in his 75 cutlass 442 with 455. The old crossover is rusted out, he ordered walker crossover 42243, when he tried to put on car it would hit oil pan ( stock) before it reaches exhaust manifolds, way to short, 4 inches or better on each side. I see another pipe 42283. My question , is 42283 longer on each side then the 42243? or is there a different pipe he should use?

MDchanic

Sounds like he got a smallblock pipe.

I don't know the characteristics of each part number, but if one is the SB pipe, it is likely that the other is the BB pipe.

- Eric

joe_padavano

Not surprising - that pipe is for a small block Olds. Here's the Walker diagram that shows that pipe is for the 350 only:




42283 also shows up as a small block pipe - mainly the 1980-newer applications. Apparently Walker no longer stocks the 455 pipe, so off to a muffler shop he goes.

Rustbucket2

Joe , I looked at that diagram also, the high lighted part at top has 350 and 455! I knew that sb and bb had to be different. he told me no one would make one for him, to many bends! I told him to go 25 miles north to the big city of Fort Wayne Indiana, someone there will make him one. On a side note, this is the pipe summit told him he needed 42243 for his 455!

joe_padavano

Yes, Walker regularly uses the same diagram where the parts are similar. Note the (5.7L) under the crossover part number. Had the BBO pipe been available, there would have been a second P/N with (7.5L) under it. If the parts are no longer available, Walker just drops them from the diagram. If you actually go to Walker's e-Catalog, you'll find that for a 1975 Cutlass, the 350 is the only engine option they let you pick.

And Summit operators are NOT well versed in part applications. Just try to get Oldsmobile motor mounts from them!

FYI, here's an example of another Walker diagram. Note how there are two different P/Ns for the converter with application notes below them.

Rustbucket2

I see, Joe thanks , my friend will just have to have one made.

Olds64

Better yet, he can go to dual exhaust. Or, he can put headers on it. MAW!