383 Chevy Small Block Engine - Make 59 LB-FT and 33 More Horsepower For Almost Free!
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This collector extension is nothing more than a length of 3-inch pipe welded to a simple collector reducer. If you're a good scrounger, you can probably build a pair of these for free. Otherwise, Summit Racing sells the parts for under $30 to build a pair of extensions. View Related Article
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