except the rx7 which still has the exhaust ports on the same side. The main reason to go single on those car is simplicity and cost effectiveness. On a V6 the simplicity factor goes out of the window due to the complex packaging. That is the main reason why a single on a Z is not practical.
Harry
Formerly yellowzxtt
" If it doesn't make it faster, i don't care " Please visit www.ztuner.com to GO FASTER