Thread: I need new headers for my chevy 400 small block and have manual rack and pinion steer

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In my opinion, if you're going to use shortys, you might just as well use the stock cast iron logs and keep cost down. If your goal is to make power, recommend long tube, equal length, minimum 3/8" flange thickness so they won't warp up like a potato chip from the heat and spit out the gasket (I wish someone made a 1/2" flange), minimum 16 guage tube thickness, prefer 14 gauge to limit "tinnyness sound", prefer minimum 1 3/4" tube diameter on 383, 400 SBC. Prefer tuned length, but cost is out of sight unless you build them yourself from scratch. Here's a start.....
Dynatech 740-11310 MuscleMAXX Headers