03-05-2020, 07:37 PM
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Senior Member
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Join Date: Mar 2017
Location: ABQ, New Mexico
Posts: 36,633
Thanks: 3,506
Thanked 136,542 Times in 22,784 Posts
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Shelby picked the Tri-Y headers for 2 reasons: 1 - they were cheaper than 4-into-1 Long-Tube headers. 2 - they are specifically designed to increase torque from idle to 4500/5000 RPM
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