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Gone is the Vega's stock 140ci aluminum inline four-cylinder, and in its place resides a 5.3L LM4 Gen III from a '04 Buick Rainier SUV cribbed from the salvage yard for a mere $800. Jeff Schwartz bumped the stock power rating from 290 hp to 400 hp by swapping in a discarded LS7 camshaft and adding an LS1 Corvette intake manifold he got off Craigslist for $35. MSD coilpacks and Aeromotive fuel rails and regulator dress up the engine bay and top off the pony count. Check out the fabricated engine bay braces and custom intake tubing!