Use these casting numbers to identify the exhaust manifolds you have.
Casting Number
Years
Engine
Side
Comments
336706
74-78
350
RH
336707
74-78
350
LH
336708
74-78
350
RH
336709
74-78
350
RH
Camaro & Z-28 with A.I.R.
336710
74-78
307, 350 & 400
LH
Chevelle, Camaro, Z-28, Nova and Passenger with A.I.R.
346222
74-80
307, 350 & 400
RH
Chevelle, Camaro, Nova and Passenger with A.I.R.
346247
75-77
262, 350 & 400
LH
Chevelle, Camaro, Monte Carlo and Passenger 110, 145, 155 & 175 HP
346248
75-77
262, 350 & 400
RH
Chevelle, Camaro, Monte Carlo and Passenger 110, 145, 155 & 175 HP
354432
75-76
262
RH
110 HP
354433
75-76
262
LH
110 HP
364753
76-80
307, 350 & 400
LH
Camaro, Monte Carlo, Malibu and Passenger
372243
74-83
307, 350 & 400
RH
Corvette and Replacement manifold
462697
77-79
267 & 305
LH
Monte Carlo and Malibu
462698
77-83
267 & 305
RH
Monte Carlo and Malibu
474008
78-82
267, 305 & 350
RH
745994
80-86
267 & 305
LH
3704791
55-56
265
LH
Corvette and Passenger 195 HP
3704792
55-56
265
RH
Corvette and Passenger 195 HP
3725563
56
265
LH & RH
Corvette and Passenger 210 HP 2-Bolt Flange
3731557
56
265
LH
Corvette and Passenger 225 HP
3731558
56
265
RH
Corvette and Passenger 225 HP
3732498
58
283
RH
Corvette FI
3733975
57
283
LH
Corvette and Passenger 220, 245, 250, 270 & 283 HP
3733976
57
283
RH
Corvette and Passenger 220, 245, 250, 270 & 283 HP
3737902
62-65
327
RH
300, 340, 360, 365 & 375 HP 2.5" Outlet
3746563
65
327
LH
300 HP
3747038
58-65
283 & 327
RH
Corvette and Passenger 220, 250 & 300 HP 1.9" Outlet
3747042
58-68
283, 307 & 327
RH
Corvette and Passenger 195, 200, 220, 250, 270, 275, 290, 300 & 350 HP 1.9" Outlet
3747938
64
327
LH & RH
250 & 300 HP
3747942
65
327
LH & RH
250, 350 & 365 HP
3749965
58-63
283 & 327
LH
Corvette and Passenger 230, 245, 250, 270, 275, 290, 300 & 315 HP
3750556
58-65
283 & 327
RH
Corvette and Passenger 230, 245, 250, 270, 275, 290, 300 & 315 HP
3780728
64-67
327
LH
Chevy II
3790729
64-67
283 & 327
LH
195, 220, 250, 270, 275, 300 & 350 HP 2.0" Outlet Chevy II
3790730
64-65
283 & 327
RH
220, 250 & 300 HP 1.9" Outlet Chevy II
3791162
65-66
283 & 327
RH
Chevy II with AC
3791182
66-67
283 & 327
RH
Passenger with AC
3797901
62-63
327
LH
Corvette 300, 340 & 360 HP
3797902
62-65
327
RH
Corvette 300, 340, 360, 365 & 375 HP 2.5" Outlet
3797942
63-65
327
LH & RH
Corvette 300, 360, 365 & 375 HP 2.5" Outlet
3834947
64-68
283, 307 & 327
LH
Chevelle 195, 200, 210, 220, 250, 275, 295, 300, 325, 350 & 365 HP 2.0" Outlet
3836968
55-56
265
RH
Corvette and Passenger 195 HP
3837069
55
265
LH
Corvette and Passenger 195 HP
3840715
64
283 & 327
LH
Chevelle
3840912
64-68
283, 307, 327 & 350
RH
Chevelle, Camaro and Nova 195, 200, 210, 220, 250, 275, 295, 300, 325, 350 & 365 HP 1.9" Outlet
3846559
64-71
327 & 350
LH
Corvette 250, 270, 300 & 350 HP 2.0" Outlet
3846563
64-65
327
LH
Corvette 300, 350 & 365 HP 2.5" Outlet
3846659
66
327
LH
350 HP
3849288
64-67
283 & 327
RH
195, 220, 275 & 350 HP 1.9" Outlet Chevy II
3849290
64-67
283 & 327
RH
195, 220, 275 & 350 HP 1.9" Outlet Chevy II with AC
3855163
65-68
283, 307 & 327
LH
Passenger and Truck 195, 200, 220, 250 & 275 HP 2.0" Outlet
3872723
66-67
283 & 327
LH
195, 220, 275 & 350 HP 2.0" Outlet Chevy II A.I.R.
3872729
66
283 & 327
LH
Chevelle 195,220, 275 & 350 HP 2.0" Outlet A.I.R.
3872730
66-68
283, 302, 307 & 327
RH
Chevelle, Camaro & Z-28 200, 210, 220, 250, 275, 290, 325 & 350 HP 1.9" Outlet A.I.R.
3872738
66-67
283 & 327
RH
195, 220, 275 & 350 HP 1.9" Outlet Chevy II
3872741
66-68
283, 307 & 327
LH
Passenger 195, 200, 220, 250 & 275 HP 2.0" Outlet A.I.R.
3872765
67-71
327 & 350
LH
Corvette 300, 330, 350 & 370 HP 2.0" Outlet A.I.R.
3872778
66-68
283, 307 & 327
RH
Corvette, Passenger and Truck 195, 200, 250, 275, 300 & 350 HP 1.9" Outlet A.I.R.
3887186
66
283
RH
220 HP 1.9" Outlet
3890424
64-67
283 & 327
RH
Chevy II
3892679
66-68
283, 302, 307, 327 & 350
LH
Chevelle, Camaro and Z-28 195, 200, 210, 220, 250, 275, 290, 295 & 325 HP 2.0" Outlet
3892683
66-68
283, 302, 307, 327 & 350
LH
Chevelle, Camaro and Z-28 195, 200, 210, 220, 250, 275, 290, 295 & 325 HP 2.0" Outlet
3893604
66-68
283 & 327
RH
Passenger A.I.R.
3893608
67-68
283, 302, 307, 327 & 350
RH
Chevelle, Camaro and Z-28 195, 200, 210, 250, 275, 290, 295 & 325 HP 1.9" Outlet
3896956
67-68
283 & 327
RH
Truck
3905364
69-72
307, 350 & 400
RH
Truck
3932376
69-70
307, 327, 350 & 400
RH
Chevelle and Camaro 200, 210, 250, 255, 265 & 300 HP 1.9" Outlet
3932461
69-74
327 & 350
LH & RH
Corvette 190, 195, 200, 235, 255, 300, 330 & 350 HP 1.9" Outlet A.I.R.
3932465
69-70
327, 350 & 400
RH
Passenger 235, 250, 255, 265, 300 & 350 HP 1.9" Outlet
3932469
69-70
327 & 350
LH
Passenger 235, 250, 255 & 300 HP 2.0" Outlet
3932473
69-70
327, 350 & 400
LH
Passenger 235, 250, 255, 265 & 300 HP 2.0" Outlet
3932481
69
350
RH
Corvette
3940972
67
350
RH
Camaro 295 HP
3942527
69-70
302, 307, 327 & 350
LH
Chevelle, Camaro, Z-28 and Nova 200, 210, 250, 255, 290, 300 & 360 HP 2.0" Outlet A.I.R.
3942529
69-70
302, 307, 327, 350 & 400
LH
Chevelle, Camaro and Nova 200, 210, 250, 255, 290 & 300 HP 2.0" Outlet
3946826
69-70
302, 307, 327 & 350
RH
Chevelle, Camaro, Z-28 and Nova200, 210, 250, 255, 290, 300 & 360 HP 1.9" Outlet A.I.R.
3959562
72-74
307, 350 & 400
RH
Chevelle, Camaro and Z-28 115, 130, 145, 150, 160, 165, 170, 175, 180, 185 & 245 HP 2.0" Outlet A.I.R.
3973432
70-74
307, 350 & 400
RH
Chevelle, Camaro, Nova and Passenger 115, 130, 150, 165, 170, 175, 180, 200, 245, 250, 255, 270 & 300 HP 2.0" Outlet
3986330
69-73
302, 307, 327 & 350
RH
Camaro and Z-28 200, 210, 245, 250, 255, 290, 300, 330 & 360 HP 1.9" Outlet A.I.R.
3989036
71-75
350
LH & RH
Corvette and Passenger 165, 195, 200, 205 & 270 HP 2.0" Outlet with and without A.I.R.
3989041
69-74
302, 307, 327, 350 & 400
LH
Camaro, Z-28 and Nova 115, 130, 145, 150, 160, 165, 170, 180, 185, 200, 210, 245, 250, 255, 290, 300, 330 & 360 HP 2.0" Outlet with and without A.I.R.
3989043
70-73
307, 350 & 400
LH
Chevelle, Camaro, Nova and Passenger 105, 115, 130, 145, 150, 165, 175, 185, 200, 245, 250, 255, 270 & 300 HP 2.0" Outlet with and without A.I.R.
3989055
69-72
307, 350 & 400
LH
3997742
71-78
307 & 350
RH
2.0" Outlet
3998902
72-78
307 & 350
RH
10045315
88-94
305 & 350
LH
10045317
88-94
305 & 350
LH
10045317
88-94
305 & 350
LH
10046123
87-92
305 & 350
LH
10046139
84-85
350
LH
10046140
84-85
350
RH
10055734
87-91
350
RH
10092901
89-91
350
LH
10092903
89-94
350
LH
10092905
89-94
350
LH
10108437
87-93
305 & 350
RH
10128448
91-93
305 & 350
LH
10128483
91-93
305 & 350
LH
10166144
91-94
350
RH
10166145
87-90
305 & 350
LH
10166147
89-94
305 & 350
LH
10166158
89-94
305 & 350
RH
10168494
94
265 & 350
LH
10207656
93-94
350
LH
10207657
93
350
RH
10433037
82-86
305
LH
12550621
94
265
RH
12550622
91
350
RH
14007400
80-86
267 & 305
LH
14014437
80-84
305
LH
14014438
80-84
305
RH
14014459
81-86
305 & 350
LH
14014500
79-86
267, 305 & 350
RH
14022625
80-81
305
LH
14031361
82-86
305
RH
14031376
81-86
350
RH
14034069
81-86
350
RH
14034075
81-86
305 & 350
LH
14043373
82-86
305
LH
14050233
83-86
305 & 350
LH
14050282
83-87
305 & 350
RH
14050287
82-86
305
LH
14057029
84-85
350
LH
14057030
84-85
350
RH
14060630
81-86
350
RH
14060633
81-86
305 & 350
LH
14067365
77-86
267, 305, 350 & 400
LH
14068667
85-88
350
LH
14068670
85-88
350
RH
14071200
83-86
305
RH
14075611
83-86
305
LH
14079295
85-86
305 & 350
LH
14079296
85-86
305 & 350
RH
14087511
86-91
350
LH
14087512
86-91
350
RH
14093653
87-90
305 & 350
LH
14093654
87-90
305 & 350
RH
14093655
87-90
305 & 350
LH
14093658
88-94
305 & 350
RH
14093660
87-90
305 & 350
RH
14093682
87-90
305 & 350
RH
14094045
87-90
305 & 350
LH
14094063
87-92
305 & 350
LH
14094064
87-92
305 & 350
RH
14094065
85-88
350
RH
14101054
87-88
305 & 350
RH
14102016
88-94
305 & 350
RH
14102018
89-94
305 & 350
RH
14103206
87-91
305 & 350
RH
14103207
87-91
305 & 350
LH
329225
73-76
454
LH
Chevelle and Passenger with and without A.I.R.
353028
73-76
454
LH
Chevelle and Passenger with and without A.I.R.
353030
73-76
454
LH
Police
3732793
58-61
348
LH
Passenger
3732794
58-61
348
RH
Passenger
3767583
59-61
348 & 409
LH
Passenger
3767584
59-61
348 & 409
RH
Passenger
3814682
62-64
409
RH
Passenger
3814683
62-64
409
LH
Passenger
3822925
62-64
409
LH
Passenger & Z-11
3822926
62-64
409
RH
Passenger & Z-11
3855161
65
409
LH
Passenger 340 & 400 HP
3855162
65
409
RH
Passenger 340 & 400 HP
3856297
65
396
LH
325 HP
3856301
65
396
LH
425 HP Corvette
3856302
65
396
RH
425 HP Corvette
3856306
65
396
RH
Passenger 325 HP
3857297
65
396
LH
Passenger 325 HP
3868874
65-66
396
RH
Chevelle 325, 360 & 375 HP Z-16
3869925
65
396
LH
Chevelle 375 HP Z-16
3872770
66
396
RH
3880827
66-69
427 & 454
LH
Corvette
3880828
66-72
427 & 454
RH
Corvette 270, 365, 390 & 425 HP with and without A.I.R. LS-5 & LS-6
3880869
70-72
454
LH
Corvette 365 & 425 HP with and without A.I.R. LS-5 & LS-6
3883827
66
427
LH
Passenger
3883828
66
427
RH
Passenger
3883999
66
396
LH
Chevelle 325, 360 & 375 HP
3884504
66-67
396 & 427
RH
Passenger 325, 385 & 390 HP
3892307
66-67
396 & 427
LH
Passenger 325 & 390 HP
3902401
67
396
LH
Chevelle
3904399
66
396
LH
3909879
67-70
396, 427 & 454
LH
Chevelle, Camaro and Nova 325, 350, 375, 425, 430 & 450 HP LS-6 COPO
3909880
67
396
RH
Chevelle and Camaro 325, 350 & 375 HP
3914613
68-70
396 & 427
LH
Passenger 265, 325, 335, 345, 390 & 425 HP
3916178
68-70
396, 427 & 454
RH
Chevelle, Camaro, Nova and Passenger 325, 350, 375, 425, 430 & 450 HP COPO LS-5 & LS-6
3969869
70-74
454
LH
Corvette 270, 365 & 390 HP with and without A.I.R. LS-5
3989310
71-72
402 & 454
RH
Chevelle, Camaro, Monte Carlo and Passenger
3989343
71-72
402 & 454
LH
Chevelle, Camaro, Monte Carlo and Passenger
3994045
73-75
454
LH
Police