Spotter's Guide Hood Bird Guide Color Guide

1973 Firebird Engine Options

                    Engine ID Stamping  
UPC Code Type Source Displacement (cubic Inches) Bore & Stroke Carb Comp HP/RPM Torque/RPM VIN Manual Auto Usage
L-22 Inline 6 Chevrolet 250 3.875 x 3.531 1 bbl 8.5:1 110@3800 185@1600 D standard Base. Not avilable with Aire Conditioning.
L30 V-8 Pontiac 350 with single exhaust 3.875 x 3.75 2 bbl 7.6:1 150@4000 270@2000 M ZB WA, WL, ZW Optional Base. Standard Esprit
L30 V-8 Pontiac 350 with dual exhaust 3.875 x 3.75 2 bbl 7.6:1 175@4400 280@2400 N Standard Formula
L65 V-8 Pontiac 400 with single exhaust 4.125 x 3.75 2 bbl 8.0:1 170@3600 320@2000 R N/A X4, X3, W5 Optional Esprit. Automatic only.
L78 V-8 Pontiac 400 4.125 x 3.75 4 bbl 8.0:1 230@4000 325@3200 S Y6, YG XN, XX, YK Optional Formula. 4 speed or Automatic only.
L75 V-8 Pontiac 455 4.15 x 4.21 4 bbl 8.0:1 250@4000 370@2800 W ZZ, ZE XE, XL, X7, XM Optional Formula. Standard Trans Am. 4 speed or Automatic only.
LS2 V-8 Pontiac 455 Super Duty 4.15 x 4.21 4 bbl 8.0:1 310@4000 390@3600 X ZJ XD Optional Formula and Trans Am. 4 speed or Automatic only.