high-end power is better but I usually keep it under 4000rpm maybe 5000rpm on the streets anyways. 'MY' butt dyno says there is a noticeable loss in low-end torque. I believe having a cat is a better setup for the streets and I think I'll put the stock cat back on.
btw, do not buy Tsudo downpipe+midpipe combo from ebay. downpipe don't line up with the stock cat at all. even downpipe+midpipe combo don't line up with the stock exhaust. I had to pull the exhaust forward like 3 inches to install dp+mp combo.

 

This has been talked about to death and is a widely known issue with installing a full exhaust...

 

I didnt notice that much tq loss. But top end

 

If you go to Wael's site you'll see his 2 dynos, one with a high flow catalytic converter and the other with a midpipe. It basically shows the power shift that occurs in the upper rpms.

 

Buy this and youll definetely keep your low end torque

http://www.rx7store.net/index.asp?Pa...ROD&ProdID=885