Thinking about ways to sqeeze more out of 2.5. Has anyone extrude honed a Suby intake manifold? If so, what kind of results? Thanks, Watty

 

Well, that seems to be one of the bottlenecks in making more HP, however, I would concentrate on other areas first, Inatke, exhaust, headers, cat, Heads, cams, pulleys, and then worry about the intake manifold and TB.