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