iv decided to keep my twin scroll and build this manifold with two blowoffs. dose anyone no what size tubing ill need ( what size is the standard manifold piping in that section of the standard exhaust ) 2012-08-08 21.17.10 by daniel.daniel371, on Flickr 2012-08-06 22.58.34 by daniel.daniel371, on Flickr 2012-08-06 22.31.27 by daniel.daniel371, on Flickr