Hi would I be correct in guessing that the exhaust on a TF magna is the same and will fit TJ model cheers

Yes and No

The cat on the TH onwards is longer thus the centre pipe is shorter. The rear flange for the muffler is larger on the TH also. If you want to run the TJ exhaust you need to run the complete exhaust including cat

OK so in other words yes it would work, I mean as a friend wishes to buy the TF magna exhaust off me to use on her 2001 model. She will get back to me and let me know exactly what parts is buggered on hers but worse comes to worse she could fit the full TF unit to the TJ (including the Y pipe)
would you be able to give me dimentions on the two model pipes pls cheers