Holley Hi-Ram Lower Manifold - GM LS3/L92 10291 Standard Motor Products SMP Fd-487

Standard Motor Products SMP Fd-487

350 HO / HT383 / 602 Crate Engine

Available in 0-90 ohm (GM mid 60's to mid 90's)

1979-1991 Mercury Grand Marquis

10 Degree Layback

Holley Hi-Ram Lower Manifold - GM LS3/L92 10291 Standard Motor Products SMP Fd-487Plenum Top Gasket Type 3 32" Round O ring Cord Mounting Flange Gasket Type Standard LS3 Molded O Ring Port Size 2. 49" Height x 1. 21" Wide Runner Length 6. 50", As Cast Runner Cross Sectional Area Tapered 4. 25" to 2. 77 inThese parts should be used for the following applications: Racing Performance Street Rodder where hood restrictions are NOT a consideration. Mounting Flange Gasket Type Standard LS3 Molded O Ring Port Size 2. 49" Height x 1. 21"