Header Sizing

[07trx400ex]

Does anyone know the header sizing/diameter for the stock Honda 400ex headers and also for a popular aftermarket piece.

Also, does anyone know the length of both of the headers, up to the bend(Y)?(for stock)

If so, where did you find this info?

[07trx400ex]

DOES ANYONE KNOW?

[drew416ex]

Not sure but I think stock is close to 1" and my sparks x-6 looks close to being 1 1/4". NOt sure of the length to the bend. Like I said, those are just eye balling it.