1972 Pontiac Firebird Trans Am 455 CID
Manual Transmission Engine Specifications

Engine Code

WL, WC

Engine RPO

LS5

Displacement

455 CID

Bore x Stroke

4.1522" x 4.121"

Compression Ratio

8.4:1

Horsepower @ RPM

300@4000

Torque (Lb/Ft) @ RPM

4150@3200

Head Casting

7F6

Carburetor

4-bbl

Carburetor - Federal

7042273

Intake Manifold

488945

Camshaft

Part #

Lift, I/E

.408 / .406

Rocker Arm Ratio

1.5:1

Duration I/E - Degrees

288 / 302

Overlap - Degrees

63

Intake Valve Dia -

2.11"

Exhaust Valve - Dia

1.77"

Distributor

1972 Pontiac Firebird Trans Am 455 CID
Automatic Transmission Engine Specifications

Engine Code

YE, YA

Engine RPO

LS5

Displacement

455 CID

Bore x Stroke

4.1522" x 4.121"

Compression Ratio

8.4:1

Horsepower @ RPM

300@4000

Torque (Lb/Ft) @ RPM

415@3200

Head Casting

7F6

Carburetor

4-bbl

Carburetor - Federal

7042270

Intake Manifold

488945

Camshaft

Part #

9779068

Lift, I/E

.408 / .406

Rocker Arm Ratio

1.5:1

Duration I/E - Degrees

288 / 302

Overlap - Degrees

63

Intake Valve Dia -

2.11"

Exhaust Valve - Dia

1.77"

Distributor