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Exhaust manifolds V-8- (Pair) Oldsmobile for small block. (inv. 271)
Exhaust manifolds V-8- (Pair) Oldsmobile for small block. (inv. 271) $400 USD Plus Shipping 91304
Here are a pair of 1967 Oldsmobile 330 V-8 exhaust manifolds off of my personal ‘67 Cutlass Supreme. There are in extremely nice condition. By the way, check out my “new” fancy shmancy 442 exhaust pipes. BOO-YAH, BABY! Finally got them.
CONDITION-WISE. OK, back to the manifolds. The donor car is a lifelong bone dry San Fernando Valley, California rust free car. Therefore, the manifolds do not suffer from that god awful pockmarked-to-death syndrome that so many manifolds get back in the rust belt. This car was so freaking quiet. It had single exhaust with a stock muffler and even a resonator. The car idles so smoothly that you couldn’t even hear the exhaust.
Not anymore! Now it’s a roaring brute with those 442 mufflers. These are in truly spectacular condition. The exhaust valve butterfly thingee is velvety smooth with just the right tension on the return spring. The counter weight seems perfect, too.
All 3 of the all-too-important “rings” or “collars” are there, too. Muffler shops don’t seem to have many of these any more. I don’t know why. They are absolutely critical. They are 2 different sizes. None of the 6 threaded holes are stripped or wonky. The correct size bolt screws right in there really easily. There are no broken off or rusted to death unremovable studs to fret over. I had these professionally sandblasted, and then coated in several light coats of that VHT brand header paint stuff. They look gorgeous.
The flat surfaces by the exhaust ports are nice. The part numbers are as follows: the driver’s side reads 380001 LH, and the passenger side reads 381921. OK, interchangeability wise, I will quote from the 1974 edition of the Hollander interchange manual in a minute. But first, a generalization.
Olds manifolds are all quite similar, unlike Pontiac. There are a few wacky exceptions like the awesome ’65 and ’66 Starfire dual exhaust driver’s side, and the excellent 1969 and up big block in the Cutlass chassis variety. Here's my “generalization”. All small block Olds engines, starting in 1964 with the 330, and going up thru 350 in 1968, and 403 in 1977, and finally the wimpy 265 and 307 of the disco/smog era are all the same basic architecture. Any old manifold should fit any old cylinder head in any old car, except Toronado.
These will even work on big block engines. I personally currently own a 1970 Cutlass with a 1969 455 engine, and the previous (obviously really desperate) owner decided to run the stock 1970 350 driver’s side manifold, and because he wanted easy to do dual exhaust, he installed a 403 Toronado manifold on the passenger side. Yep! Small block Toronado on one side and 350 on the other side in a big block Cutlass chassis car. The car has great sounding dual exhaust, but I am sure it is a bit restrictive at higher RPMs.
And now here we go with the NARRATIVE. These will probably fit each and every 330-350 powered 1964 to 1977 Cutlass type cars, including the 1977 403 powered 442. They will probably fit the 1964 Jetstar 88, and all of the 1965 to 1970 big cars with a small block engine.
Likewise, they will probably fit all of the 350 powered 1971 to 1976 Delta 88 type cars. Finally, these should fit all of the 403 powered cars from 1977 to 1979 like Pontiac Firebird Trans Am and Formula, various Oldsmobile models like the 1977 442, all of those full-size Buicks, and even the GM designed motor homes. Well, maybe not the motor homes. They have a front wheel drive powertrain lifted from the Toronado. So, motor home, NO, everything else, yes.
NOW HERE GOES THE INTERCHANGE FROM THE 1974 HOLLANDER INTERCHANGE MANUAL:
Drivers side casting number 380001 LH was installed on:
1964 thru 1967 330 F-85 (Cutlass) cars (like my 1967)
1968 thru 1969 350 F-85 (Cutlass) cars
Passenger side casting number 381921 was installed on:
1964 thru 1966 Jetstar 88
1967 Delmont 88 with 330
1968 thru 1974 88 models with 350
1964 thru 1967 F-85 (Cutlass) cars with 330 (like my 1967)
1968 thru 1974 F-85 (Cutlass) cars with 350
Whew! What a listing. Obviously when they say “thru 1974” they can’t predict the future because this edition was published in 1974 when I bought it way back then. So, they should obviously fit the later cars as I mentioned above. That’s about it, kiddies.
There’s nothing particularly exceptionally rare or exotic about these, except for the awesome condition and the advanced age. However, these will be a real lifesaver for the person who buys a really nice, let’s say, 1965 Cutlass convertible that doesn’t have an engine any more, and doesn’t want the fuss or expense of tube headers. Nobody bothered to save these things back then.
And let me tell you a thing about Olds headers. I had them on my 1969 Cutlass convertible with a 350. They literally touched the oil filter, and didn’t allow access to the control arm mounting bolt. Once they scraped on the road over a bump in the road, they leaked and hissed for the rest of time. I hate headers. They’re great for drag racing and making top power, but on the street in normal regular service, yecch. That’s my opinion.
