The Twister, Part IV
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Even with the large TFS 215cc intake heads and thumper cam, the HT 383 made best power and torque with a set of 1-5/8-inch Hedman street headers running through mufflers. It took only a minor jet-change tune-up to crank out 500 lb-ft of torque and 491 hp at 5,700. This GM Performance Parts HT 383 continues to amaze us with its excellent power. View Related Article
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