67cutlassguy

Hello, I can really use some advice on my 67 44bl cutlass supreme. I currently have single exhaust in need of replacement, and going to go with a dual setup. The clearances to the oil filter housing are so tight, and with the AC compressor there, I'm having trouble getting to these rusted bolts to get the exhaust pipe off the manifold flange. Is it a good idea to remove the oil filter housing to get better clearance? Also, will the pypes DOF10S downpipes work to marry the new dual setup? I think they may be for big blocks since they're advertised for 1965-72 442's. Thanks.

olds 307 and 403

The Pypes down pipes may need minor mods but others have made them work on 350's.

67cutlassguy

These are the ones, im having trouble figuring out if the flange angles will match the small block manifold...i'm thinking they might be for big blocks. What then lol

tkheld

I have a Pypes system on my 67 CS Conv with a 330. The downpipes bolt right to stock exhaust manifolds.

67cutlassguy

do you know the part number for the downpipes they used on your pypes system? The picture of the ones I included is apparently for big block olds
thanks

olds 307 and 403

They bolt to both.

tkheld

Unfortunately I don’t have the receipt but I do not think there is a difference between big block and small block. Pypes only shows one part number for the downpipes. I also just did an engine swap in my son’s 70 Cutlass - from a 350 to a 455 and the existing exhaust system (not a Pypes) bolted up with no modifications.