Edelbrock designed this 2171 SBF Performer intake manifold for 400 cubic inch Ford V8s produced from 1971-82 with 2V Cleveland heads and 351M V8s produced from 1975-82. Will not fit 1974 and earlier 351C V8s. Edelbrock carbs will work with Ford automatic overdrive trans (AOD) when used with Lokar bracket SRK-4000. Edelbrock 2171 SBF Performer Intake Manifold 400 Features: Dual Plane style Valley width measures 8-17/32" RPM Range: Idle-5500 Non-EGR Satin Finish The Edelbrock name has been a staple of the automotive performance industry since the 1940’s. Their product line includes virtually everything under the hood, from individual components to complete engines. This makes Edelbrock one of the most recognized as well as trusted brands in the racing and performance world!