Model 5083 - Holley 500 - 2-Barrel on ROCHESTER 2-Barrel Manifold
Model 5085 - Holley 500 - 2-Barrel to 4-Barrel manifold ("STRAIGHT" bores)
Model 5088 - Holley 500 - 2 -Barrel to 4-Barrel manifold ("EXIT RADIUS" bores)
Model 5091 - Holley 500 - 2-Barrel to 4-Barrel manifold ("HOURGLASS" opening)
Model 5094 - Holley 500 - 2-Barrel over REAR BORES on "Q-JET" 4-Barrel Manifold
