All are extreme vehicles as far as cabin mods.
We have been selling for about 6 months and have had allot of succes with them we just completed a 92 Nissan 240sx hatchback 4 Arm 15's with a punch 800a2 per sub at 1.5 ohm mono and it is hitting upper 158's with little cabin mods. They go loud in Vented boxes and sound reasonbly good as well. We have also had some success with the KXP subs in small sealed boxes. I hope this helps.
Take off the magnet collar for better heat transfer.
Just my view.
The one think I like about these subs is the warranty we have blown some due to installer error to much power etc. and have had no problem warrnty wise, That is a big consideration when it comes to buying subs that are above $500