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Re: Question on header diameters..
Smaller primary tubes help low end torque. If your engine is stock or very mild, I would run 1 5/8. We ran 1 3/4 and 1 7/8 on a 480hp camero bbc drag car. My 2 cents.
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68 C10 250 4spd
69 C20 327 4spd
69 910 250 3spd
80 K10 350 4spd
76 C60 366 5spd school bus
"THERE'S NOTHING YOU CAN BREAK THAT SOMEONE CAN'T BE PAID TO REPAIR"
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