I don't know very much about the g-ready exhaust. I don't think any after market kit has you weld off the first resinator and x pipe... Your warranty will probably be void to un lexus.

any muffler shop will do it if you ask for 40-50 bucks...
godd luck

 

I'm thinking of making a race pipe that will go from manifold to the cat back. It'd be cat free, no CEL and full stainless. Think it'd be something people would be interested in? Only question is whether I should make it dual or x-style like stock.

 

you mean leave the 3 feet of single 2" pipe in??? why? straight back only, i think total 4" flow not 2".