How to modify a STEP file in Inventor 2010

Please could you all help me how to. i can open STEP files in inventor (2010) but can not modify at all.
fyr: Honda GX 160
i want to replace this exhaust for my custom, but i can not!

Thanks & regards,
Phil

3 Answers

You wont have access to sketches or anything like that. All you can do (in my experience) is use extrusions, move faces, delete faces, etc., to modify it.

Dear Nuno Felix,

Thank you for your answer

Regards,
Phil

Try KeyCreator.
It allow you to modify any solid from any CAD.

See video:
https://www.youtube.com/watch?v=2PJDHxZqTgQ