I believe this is the only 8 inch shallow mount they make. Installer had to make some small mods you probably can google for info. Big difference in sound. Stocks looked they were $2 speakers.
TS-SW841D
8" Shallow-Mount Subwoofer with 500 Watts Max. Power
Hey Phil I read where you installed pioneer shallow mounts, can you tell me what model you went with as I'm wanting to change out the factory subs too. Thanks Jay