Nitrous vs Cylinder Heads - Bolt-Ons Vs.The Bottle
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Once installed on the 331, the AFR 185s increased the peak power from 347 hp and 398 lb-ft to 450 hp and 446 lb-ft. At 6,000 rpm, the AFR heads improved the power output of the 331 stroker by an amazing 125 hp. View Related Article
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