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1971 Firebird Engines
RPO Code
UPC Code
Type
Source
Displ (cid)
Bore & Stroke
Carb
Comp
HP/RPM
Torque/RPM
VIN
Block code(s)
RPO
UPC
Transmission
Axle
Opt Axle
Base
Esprit
Formula
Trans Am
Notes
34A
L22
Inline 6
Chevrolet
250
3.875 x 3.531
1 bbl
8.5:1
155@4200 Gross
235@1600
n/a
CAA, ZB
35A
M12
3 Speed Manual (Column Shift)
3.08:1 n/a w AC
S
n/a
n/a
n/a
CAB, ZG
35J
M35
2-Speed Powerglide Automatic
A
n/a
n/a
n/a
110 net hp
35K
M38
3-Speed Turbo Hydramatic Transmission (Turbo 350)
A
n/a
n/a
n/a
34D
L30
V-8
Pontiac
350
3.875 x 3.75
2 bbl
8.2:1
255@4600
355@2800
n/a
WR
35B
M12
3 Speed Manual (Floor Shift)
3.42:1
A
S
S
n/a
35C
M13
3 Speed Heavy Duty Manual with Floor Shift
A
A
A
n/a
WU
35E
M20
4 Speed Wide Ratio Manual Transmission (Floor Shift)
A
A
A
n/a
165 net hp
YU
35J
M35
2-Speed Powerglide Automatic
2.73:1
3.08:1
A
A
A
n/a
XR
35K
M38
3-Speed Turbo Hydramatic Transmission (Turbo 350)
A
A
A
n/a
34G
L65
V-8
Pontiac
400
4.125 x 3.75
2 bbl
8.2:1
265@4400
400@2400
n/a
XX
35L
M40
3-Speed Turbo Hydramatic Transmission (Turbo 400)
2.73:1
3.08:1
n/a
A
n/a
n/a
180 net hp
34L
L78
V-8
Pontiac
400
4.125 x 3.75
4 bbl
8.2:1
300@4800
400@3600
n/a
WT
35C
M13
3 Speed Heavy Duty Manual with Floor Shift
3.42:1
3.73:1 n/a w AC
n/a
n/a
A
n/a
WK
35E
M20
4 Speed Wide Ratio Manual Transmission (Floor Shift)
n/a
n/a
A
n/a
35G
M22
4 Speed Close Ratio Manual (Floor Shift)
3.73:1 n/a w AC
n/a
n/a
A
n/a
YS
35L
M40
3-Speed Turbo Hydramatic Transmission (Turbo 400)
3.08:1
3.42:1
n/a
n/a
A
n/a
34P
L75
V-8
Pontiac
455
4.15 x 4.21
4 bbl
8.2:1
325@4400
455@3200
n/a
YC
35L
M40
3-Speed Turbo Hydramatic Transmission (Turbo 400)
3.42: 1 w/o AC, 3.08:1 w AC
n/a
n/a
A
n/a
34U
LS5
V-8
Pontiac
455 HO
4.15 x 4.21
4 bbl
8.4:1
335@4800
480@3600
n/a
WL
35C
M13
3 Speed Heavy Duty Manual with Floor Shift
n/a
n/a
A
n/a
WC
35G
M22
4 Speed Close Ratio Manual (Floor Shift)
3.42:1
n/a
n/a
A
S
YE
35L
M40
3-Speed Turbo Hydramatic Transmission (Turbo 400)
3.42:1 w/o AC, 3.08:1 w AC
3.73:1 n/a w AC
n/a
n/a
A
A
1971 Firebird Transmissions
RPO Code
UPC Code
Type
Usage
Codes
Base
Esprit
Formula
Trans Am
Notes
35A/35B
M12
3 Speed Manual (Column Shift)
L22 250 cid Inline 6 Cylinder Column Shift
S
n/a
n/a
n/a
3 Speed Manual (Floor Shift)
L30 350 cid V8 Floor Shift
A
S
S
n/a
35C
M13
3 Speed Heavy Duty Manual with Floor Shift
L30 350 cid V8
A
A
A
n/a
L78 400 cid V8 4bbl
n/a
A
A
n/a
LS5 455 cid HO V8
n/a
n/a
A
n/a
35E
M20
4 Speed Wide Ratio Manual Transmission (Floor Shift)
L30 350 cid V8
A
A
A
n/a
L78 400 cid V8 4bbl
n/a
A
A
n/a
35G
M22
4 Speed Close Ratio Manual (Floor Shift)
L78 400 cid V8 4bbl
n/a
n/a
A
n/a
LS5 455 cid HO V8
n/a
n/a
A
S
35J
M35
2-Speed Powerglide Automatic
L22 250 cid Inline 6 Cylinder
TH
A
n/a
n/a
n/a
L30 350 cid V8
TS
A
A
A
n/a
35K
M38
3-Speed Turbo Hydramatic Transmission (Turbo 350)
L22 250 cid Inline 6 Cylinder
JE
A
n/a
n/a
n/a
L30 350 cid V8
MA
A
A
A
n/a
35L
M40
3-Speed Turbo Hydramatic Transmission (Turbo 400)
L65 400 cid V8 2bbl
n/a
A
n/a
n/a
L78 400 cid V8 4bbl
n/a
n/a
A
A
L75 455 cid V8 4bbl
n/a
n/a
A
A
LS5 455 cid HO V8
n/a
n/a
A
A
1971 Engines
Where to find the Engine ID stamping
Chevrolet made Inline 6 Cylinder Engine (Typical)
Pontiac V-8 Engine (Typical)
Examples shown on this page consist of scanned images or reproduction artwork that can not be faithfully reproduced on a computer screen. Illustrations are for example only. Consult with your vendors offerring reproduction parts for their historical accuracy.
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