ITRCA

NEW DC Sports Ceramic 4-2-1 Header. One Piece. Will fit a DC2 00-01 gsr.

Update: It's carb exempt. The carb number is included with the header. Price reduced! Shipped priority and paypal'd for $175.

This ? is for seller or others...
Ceramic is the way to go, no doubt.
But,
What factors make 4 into 1 vs 4into2into1 a better choice?
Is the 4into2into1 more compact?