General Motors Atlas Vortec 4200 T4 Exhaust ManifoldAtlas Vortec 4200 T4 with divided single 50mm wastegate! Not one person asked for this! BUT, I think this engine has not received the attention it deserves. Artec have been working with nivlac57 and motionautotv. The 4200 Straight 6 from @generalmotors was released in a Blazer, but the ability for this engine to hold itself together at now over 700whp through an auto has been documented by Calvin over at the Nivlac57 YouTube Chanel. We have designed
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General Motors Atlas Vortec 4200 T4 Exhaust Manifold