the weiand brand covers the application spectrum from california-legal to seriously- ... -up non-egr bb chevy oval spreadbore sb ford lo-profile stealth manifold weiand has ... response of a typical dualplane plus flows as well as a single plane all the way ... modified engines application chevy sb ford 429-460 ford sb ford 351w team g ... ° open plenum design provides excellent flow through the upper rpm range a must have ... 305 327 350 400 v8 1987-later w/alum heads chevy bb 396-502 oval ports chevy bb ... it contains extra material for flow modifications hand cnc or extrude hone ... 650 750 cfm holley hp application ford 351c 2v heads ford 221-302 exc boss ... rulebook under stock car and engine specifications the 7547-1 manifold is listed as ... the 7547-1 manifold is the only spec manifold for the new sportmod class ...