C6 fixing hole centres 63 x 30. C3 fixing hole centres 61 x 29.
I Modified to fit my C3 By carefully slotting the fixing holes. The actual distance the hole centres move is only 1.1mm on the diagonal. Works a treat. Great product!
Received my tail tidy last week getting it fitted 1st July looks very sturdy when it's put together very good quality not flimsy ..looking forward getting it on bike .instead off the horrible number plate it has now