BMW M4; S1000 RR
These.
http://www.ice-direct.com/cid/LORPQ...H/Focal-165CVX-6-Coaxial-Speaker-PFOC_165CVX/
Or
http://www.ice-direct.com/JL-Audio-VR600CXI-6-Coaxial-Speaker-PJLA_VR600CXI/
I've heard the 13cm version of the latter on a headunit with less power/processing than mine and they sounded pretty good! But Focals are Focal...
http://www.ice-direct.com/cid/LORPQ...H/Focal-165CVX-6-Coaxial-Speaker-PFOC_165CVX/
Or
http://www.ice-direct.com/JL-Audio-VR600CXI-6-Coaxial-Speaker-PJLA_VR600CXI/
I've heard the 13cm version of the latter on a headunit with less power/processing than mine and they sounded pretty good! But Focals are Focal...