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The x head is the best in cast iron, but too much money, try the 915 head is is great than the 587, 596.

Join Date: Dec 1969 Location: NewFairfield Ct Posts: 4,425 Post your combo -------------------------------------------------------------------------------- Copy and paste this format into the message window and fill in the blanks Car 73 Duster Weight-3305 NHRA RAted Gear ratio 513...

I run a NHRa stocker with a low compression 340. I ahave tried all the different types and tube sizes. I ran the 1 5/8 at first and tried the 17/8, the 15/8 was run for the torque they make over the 17/8. I have three sets of headers for my car and pick the right ones for the track and air. My...