I apologize for the newbyish question, still trying to learn the ins and outs of everything. I am considering doing a cat delete and was wondering if midpipes would fill that area. Thanks!

 

If you buy the megan mid pipe for the SC430, it deletes the rear cat but no the front two (only the 01+ 430 has the rear cat)

It does require an extension piece welded in.

 

Would this piece do the same without having to weld in an extra piece?

http://topspeedauto.com/lexus-gs300-...ipes-mid-pipe/

 

No, those are the catback pipes behind the "y" pipe - I think they used to make the Y pipe as well but no more.

What is it you are trying to achieve?

To delete the cats? My only advice there is a very very strong "NO".