[F'n around]

I remember reading a thread on here that someone did a delete on the mufflers and rear cats. I can't remember if they did any dyno testing though after. I'll try to search a bit later when I get some time and I'll post if i find it.

 

[F'n around]

here is a recent thread I found on a quick search.

http://www.lexusfforum.com/forums/showthread.php?t=3361&highlight=muffler

 

[F'n around]

here is another.

http://www.lexusfforum.com/forums/showthread.php?t=3180&highlight=muffler

Do a quick search for "muffler" and you will find a few topics on the discussion.

Good luck.