Thanks for the reply, the dash speaker kit i ordered is this one.
https://cai-store.com/collections/996-986-porsche-audio-upgrades/products/996-speaker-adapters-hardware-kit-also-boxster
I selected for 4" speakers.
Everything i have read says the stock speaker box uses 5.25 inch speakers, to fit 6.5 you need to remove the tuned port and make a new mounting plate. Just wanted to double check i want to use jbl gto components in the door and prefer to go with the larger version.
Thanks for the info.