Mast Motorsports Ls3 L99 Track Packages Ls3 Heads Dyno
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The new heads did exactly what we thought they would-they made more power and in a much better place. With 568.1 hp and 507 lb-ft of torque, we were up 90.5 hp and 50.7 lb-ft from stock, but more interestingly we gained 31.2 lb-ft over the stock heads with the same camshaft. View Related Article
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