Spotter's Guide Hood Bird Guide Color Guide

1971 Firebird Engines

                    Engine ID Stamping  
UPC Code Type Source Displacement (cubic Inches) Bore & Stroke Carb Comp HP/RPM Torque/RPM VIN Manual Automatic Usage
L-22 Inline 6 Chevrolet 250 3.875 x 3.531 1 bbl 8.5:1 155@4200 235@1600 n/a CAA CAB standard Base
L30 V-8 Pontiac 350 3.875 x 3.75 2 bbl 8.2:1 255@4600 355@2800 n/a WR, WU, XR, YU standard Esprit and Formula 350, optional Base
L65 V-8 Pontiac 400 4.125 x 3.75 2 bbl 8.2:1 265@4400 400@2400 n/a - XX optional Esprit
L78 V-8 Pontiac 400 4.125 x 3.75 4 bbl 8.2:1 300@4800 400@3600 n/a WK, WT, YS standard Formula 400
L75 V-8 Pontiac 455 4.15 x 4.21 4 bbl 8.2:1 325@4400 455@3200 n/a - YZ standard Formula 455
LS5 V-8 Pontiac 455 HO 4.15 x 4.21 4 bbl 8.4:1 335@4800 480@3600 n/a YE WC, WL optional Formula 455, standard Trans Am