Ok...I have a set of cheap Dynomax Blackjack headers with 1 1/2" primaries going on my 305 TPI. I found in one of the books at the auto parts store I work at that I can get a Flowtech Y-pipe for my car...with my discount, under $80 bucks instead of $110. My question is if this would work with the Dynomax shorties that I now have sitting in my living room. I just want to make sure before I order that up. I'm still keeping my catalytic converter. Thanks.