Headers - What size primaries for stage 2 Whipple?

[Aeronaut]

I haven't seen much talk about 2 inch primaries for these coyotes. Seems like most people go with with 1-7/8 headers for these cars, even with forced induction. Why? Anyone running Kooks or ARH 2 inch long tubes with a Whipple? Targeting say 700 RWHP.

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[beefcake]

we run 2" kooks on our 2018, and we had 2" arh on our 2015.

but that was for 1100 wheel.

if your staying at 700, 1 3/4 or 1 7/8 will do the trick. i actually love the pypes stepped, 1 3/4 to 1 7/8 at that power level. they do an amazing job on the low and big side

 

[jhatley7]

1 7/8" headers aren't the limiting factor at 700. Wouldn't stress it until you go for 1k +

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