Model 5040 - AFB/Edelbrock - 1/4" Phenolic "OPEN" Plenum
Model 5041 - AFB/Edelbrock - 1/2" Phenolic "OPEN" Plenum
Model 5042 - AFB/Edelbrock 500 & 600 cfm - 1/2" Phenolic 4-Hole
Model 5043 - AFB/Edelbrock 750 cfm - 1/2" Phenolic 4-hole
