[toyota_guru]

Originally Posted by joel williams

some guy on ebay is making them,, still using the stock manifold for now. here is another one for sale


http://cgi.ebay.com/ebaymotors/Supra...QQcmdZViewItem

if your still using the stock manifold, then you have accomplished nothing worth writing about by going 3". A 2.5" down pipe is better suited for the stock manifold. Its the manifold that has the most restriction on the exhaust side, not the down pipe.