1975 Pontiac Firebird Trans Am 455 CID
Manual Transmission Engine Specifications

Engine Code

WX

Engine RPO

L75

Displacement

455 CID

Bore x Stroke

4.1522" x 4.121"

Compression Ratio

7.6:1

Horsepower @ RPM

200@3500

Torque (Lb/Ft) @ RPM

330@2000

Head Casting

495351, 5C

Carburetor

4-bbl

Carburetor - Federal

NA

Intake Manifold

496140

Camshaft

Part #

Lift, I/E

NA / NA

Rocker Arm Ratio

1.5:1

Duration I/E - Degrees

273 / 289

Overlap - Degrees

54

Intake Valve Dia -

2.11"

Exhaust Valve - Dia

1.66"

Distributor