This may be a useless thread but... After looking at the Injen CAI kits 1481 for TL (and Honda) and 1660 (for CL-s) the only difference appears to be the TB connector. 1481 uses a 2.75" to 3" step connector and the 1660 uses a 3" connector. So I'm assuming the CL-s has a larger TB. Correct?

 

CL has a smaller tb than the CL-S. CL-S Auto cai is shorter than the CL due to the VSA TB that the CL doesnt have. CL-S 6 speed is different than the CL-S Auto. If you have an automatic you can use the one for the TL-S as well.