The K20Z3 transmission from the 06-11 Civic SI is something we are seeing used a little more often, and for several good reasons. These transmissions have really nice gear ratios, a pretty strong factory LSD, plus in most cases they have less mileage on them than older RSX models. The K-Tuned K20Z3 No-Cut Shifter is designed to be used in all EF, DA, EG, DC2 and EK chassis and of course, as the title states, it is installed with absolutely no cutting of the exhaust tunnel. On a manual chassis, use the OEM shifter linkage holes for the rear and simply drill 2 more holes up front and you're done. The aluminum mechanism for the shifter will then bolt in place up top and the arms will pass down through the factory shifter hole. The bottom section where the cables are connected is fully sealed and 100% leak-free unlike some other designs where water and exhaust gases can actually get inside the shifter and the cabin.
Shifter > No-Cut K-Swap Shifter (Z3)