I searched and found a few things but nothing clear cut. Is there a company that makes a good rear sub frame reenforcement for the EF? Has anyone modified an ASR one to fit on an EF?

 

Bump

 

well the ASR is for the newer models because the sway bar is mounted to the subframe, lucky you, your ef is mounted on the L brackets further back, its stronger and a better design anyway.
the asr brace keeps the sway bar's torsion from breaking the subframe
you may be thinking you want a lower tie bar, like the piece beaks sells.

http://www.beaksproducts.com/STB_EG_...me_Tie_Bar.htm

 

yesm their is one =D i found it yesterday. Beaks I believe. And I know dc sports used to make one that wasn't that bad, but it used hinges, beaks is a solid brace. Like the asr. Let me see if I can find it for you k.
http://passwordjdm.com/Beaks-Product...P2494C127.aspx
http://www.beaksproducts.com/DC_Quick_Swap.htm
I read that the beaks can rip out your subframe, because it doesn't come with a stiffer sway bar to match. So be sure to upgrade that too. Or the asr one is good too. they recently made one, and it comes with the sway bar. Wek^sos carries it