GM 350 Crate Engine Build V - The Goodwrench Quest, Part V
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The Borla XR-1 stainless steel mufflers also used 2-1/4-inch inlet and outlet sizes compared to the Hooker turbo-style mufflers tested previously. The Borlas definitely helped power but are also a bit more expensive than the Hookers. It’s hard to find fault with 430 lb-ft of torque and 408 hp! View Related Article
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