I didnt read "open downpipe" all I saw was "downpipe" so I assumed you had a 3"er already..

Damn these are easy to get power out of...fix the A/F, get a dp (actually, someone on SupraForums makes special y-pipes for 1JZs too) and who knows how much more power you'll get out of them. And better fuel economy...at that rate, I hardly wonder if you get fireballs at every shift