07 Roush 427R
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If you're familiar with Roush's Stage 3, you'll be at home under the hood of the 427R, as there are no differences. It has the same torque-happy, Roots-based, intercooled Roushcharger, but about 12 more ponies and 6 more lb-ft than the Stage 3, thanks to the freer-flowing exhaust system. View Related Article
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