1968
- 1982 Corvette Specification Guide
(1968-1982
Exhaust Manifold Casting Numbers)
1968
Exhaust Manifold Casting Numbers
|
Left-Hand |
Right-Hand |
Application |
| 3872765 |
3872778 |
All
327 Engines |
| 3880827 |
3880828 |
All
427 Engines |
1969
Exhaust Manifold Casting Numbers
|
Left-Hand |
Right-Hand |
Application |
| 3872765 |
3932461 |
All
350 Engines |
| 3880827 |
3880828 |
All
427 Engines |
1970
Exhaust Manifold Casting Numbers
|
Left-Hand |
Right-Hand |
Application |
| 3846559 |
3932465 |
Early 300 &
350 Horsepower Engines |
| 3846559 |
3989036 |
Late 300 &
350 Horsepower Engines |
| 3872765 |
3932461 |
370 Horsepower
LT1 350 Engine with AIR |
| 3969869 |
3880828 |
390 Horsepower
LS5 454 Engine |
1971
Exhaust Manifold Casting Numbers
|
Left-Hand |
Right-Hand |
Application |
| 3846559 |
3989036 |
270 Horsepower
350 Engine |
| 3872765 |
3932461 |
330 Horsepower
LT1 350 Engine with AIR |
| 3880869* |
3880828 |
365 Horsepower
LS5 454 Engine |
| 3880869* |
3880828 |
425 Horsepower
LS6 454 Engine with AIR |
*3969869 also used.
1972
Exhaust Manifold Casting Numbers
|
Left-Hand |
Right-Hand |
Application |
| 3932461 |
3989036 |
Early 200 Horsepower
350 Engine** |
| 3932461 |
3932461 |
Later 200 Horsepower
350 Engine** |
| 3932461*** |
3932461*** |
255 Horsepower
LT1 350 Engine with AIR |
| 3969869 |
3880828 |
270 Horsepower
LS5 454 Engine with AIR |
**Manifolds not drilled and tapped
for AIR (Air Injection Reactor) System except with NB2 (California)
Emission System.
***386711 also used.
1973
Exhaust Manifold Casting Numbers
|
Left-Hand |
Right-Hand |
Application |
| 3932461 |
3932461 |
All
1973-79 350 Engines |
| 3969869 |
3880828 |
All
1973-74 454 Engines |
1980-82
Exhaust Manifold Casting Numbers
|
Left-Hand |
Right-Hand |
Application |
| 3932461 |
3932461 |
1980
190 & 230 Horsepower Cast Iron |
| 14037671-W |
14037672-W |
Tabular Stainless
Steel
1980
LG4 (305) & All 1981-82 |
Exhaust Manifold Notes
Cast-iron exhaust manifold casting
dates may not be visible when manifold is installed due to date
location. Some casting numbers may not be visible when installed
due to equipment blocking view. Casting date codes are generally
the same as described for engine blocks, except some may not normally
carry a calendar-year reference. Those manifolds used with
AIR (Air Injection Reactor) emissions equipment are drilled and
tapped for AIR tubing. Manifolds generally contain a cast-in
"LH" (left-hand) or "RH" (right-hand) designating
specific installation location.
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