Clone Blue Plate vs Unrestricted (header muffler)

We’ve been bouncing back and forth between blue plate and unrestricted classes. Often times we do it with in the same night.

I know blue plates are the closest to being unrestricted as possible.

What size header pipe is best for blue plate? If and when the plate is in and the plate installed should the jet also be changed?

Do any of the header pipes “step down in diameter” as you work down the header?
 
We’ve been bouncing back and forth between blue plate and unrestricted classes. Often times we do it with in the same night.

I know blue plates are the closest to being unrestricted as possible.

What size header pipe is best for blue plate? If and when the plate is in and the plate installed should the jet also be changed?

PIpe: .880 ID. I've had great results with either the SEKS Advantage 3 (in .880) or the RAPP Fab T-16.

Jetting: there is a small change, where unrestricted is slightly leaner than blue, but without stating where your at, impossible to give recommendation.
Do any of the header pipes “step down in diameter” as you work down the header?
Not that I am aware of.


Results to back claims: Jr3 blue plate, big pipe, AKRA spec build.

 
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