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This More Performance LS6 relied heavily on the effectiveness of the Nextel Cup-style Kook's long 4-into-2-short-into-1 headers to bring the entire power production program together. The result: 726 horsepower!
Exhaust Science Demystified

 This More Performance LS6 relied heavily on the effectiveness of the Nextel Cup-style Kook's long 4-into-2-short-into-1 headers to bring the entire power production program together. The result: 726 horsepower!  View Related Article

 

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