Dynomax welded vs X

DYNOMAX ULTRA FLO X MUFFLERS (These are duel inlet and duel outlet.)
http://www.dynomax.com/products/ultraflox.html

DYNOMAX ULTRA FLO WELDED MUFFLERS
http://www.dynomax.com/products/ultrafloweld.html


You will want 2 of the ULTRA FLO WELDED MUFFLERS

ULTRA FLO WELDED MUFFLERS are not exactly quiet.

I run them with factory manifolds, x-pipe, 2 1/2 out the back.

I got kicked from my local track for sound.