Ford 351W Windsor LowRise Aluminum Intake Manifold [Black] They are five times stronger

They are five times stronger and more ridged than stock because they are made from aircraft grade aluminum alloy

Speedmaster GM automatic transmission parts are manufactured using the highest-quality materials for strength and durability

The outer case is made from 8620 Chrome-Nickel-Moly steel and the case hardened for long life

solving issues associated with the weak pressed steel plate bases

where dynamic flow and rock-steady pressure control are desired

Ford 351W Windsor LowRise Aluminum Intake Manifold [Black] They are five times strongerThe Speedmaster LowRise Manifolds are our lowest profile manifold and is also the only one that is street legal on pollution controlled vehicles. It is set up to accept a spread bore carb but comes with an adapter plate that permits the use of square bore carbs. To remain street legal with a square bore carb, you must use one that is also approved as street legal for your application.