boardkat - I talked to Wilwood and they don't make custom hats. They try to best match your requirements to hats in already production. Would need two pieces of info. Could you please ask your friend for the offset (rotor surface to hub mounting surface) and the Wilwood rotor ring replacement part number? Also, is he using stock size GT350 pads? Thank you so much!He took 3/8” off the knuckles
No part number he could provide since it was a custom order awhile back, and it looks like the only 15” option they have listed on their website is 31.8mm thick. Might need to call it in, describe what you’re trying to do and see if they’ll do another run. I’ll try and get you a contact at Wilwood to start a conversation.