Fits 1965-1990 Chevrolet 396-454 Mark IV Big Block with Rectangle Port Heads 1979-ford-e-350-econoline-esi3216965 The Holley EFI 12

The Holley EFI 12

Spark Plug Wire Loom - Short - 4 Wire - Valve Cover Mount - 7-8 mm - Grommets Included - Steel - Chrome - Clip Style - Pair

Internal Support Spring - Pro-Lite 350 - 20 AN Hose - 4 ft - Each

Car Wiring Harness - Classic Update - Complete - Mustang 1969 - Kit

They provide excellent stability

Fits 1965-1990 Chevrolet 396-454 Mark IV Big Block with Rectangle Port Heads 1979-ford-e-350-econoline-esi3216965 The Holley EFI 12Ultra Seal intake manifold gaskets are manufactured from cellulose nitrile composition gasket material. Provides excellent sealing and durability. Incorporates Silicone beading around each intake and water outlet port to provide additional sealing strength on both sides of each gasket. No gasket sealer is required. For OE replacement, high performance street, drag race, and oval track use. Includes manifold end seals and distributor gasket.