For mechanical secondary 1991-pontiac-firebird-esi6483971 the SB054 is cold formed

the SB054 is cold formed to better resist torsional fatigue and retain its "memory" far longer than the hot-formed bars used by many competitors

Installation requires cutting the factory Y-Pipe

These valve covers are available in 5 different styles

125” thick light weight aluminum panel allows you to remove the existing A/C - heater box and immediately drop unnecessary weight from the front of the car while cleaning up unwanted engine bay clutter

1hr at 482 degree F (250 degree C)

For mechanical secondary 1991-pontiac-firebird-esi6483971 the SB054 is cold formedMech Link DP Standard 40% progressive ratio found in most carburetors (gold in color). Used on mechanical secondary carburetors only. Includes required cotter pin for installation.