Chevy's new bow tie head, left to right: 14011058 cast iron V8, 14011050 aluminum V8, and 14044802 90-degree V6. All share the same intake and exhaust ... to develop the port throat: With the ...

The truth is that production iron small-block Chevy exhaust ports are weak ... This area is called the throat. The idea is to eliminate this ridge while still leaving a slight venturi effect.

What do you get when you add one part exhaust, one part air intake, and one part programmer to a brand-new Chevy truck? You get better mileage, more power, and a truck that will walk away from ...