Stop before you modify the part. Cutting, grinding, bending or welding changes what we can do for you, because those changes make it impossible to tell whether the problem was the part, the installation or something about the car. Every remedy you keep is a remedy you keep by not touching it yet.
Clear photos of the mounting points. A photo of the area that will not clear, taken so we can see what it is fouling against. Your chassis code, build year, body style and market. And a short note on where in the installation you got to, plus anything you have already fitted or removed.
Work out whether this is a variant mismatch, a clearance issue with a known fix, a support or clamp problem, or something specific to your car that we need to account for. Most fitment problems have a straightforward cause, and most of them are visible in a photograph.
A description of the part not fitting gives us little to work with. A photograph showing a pipe touching a subframe tells us which pipe, how much clearance is missing and which direction the fix has to go. That is the difference between one exchange and five.
Unmodified parts can usually be handled within our stated returns terms, and custom parts cannot be returned once production has started. Which is exactly why the first ten minutes - before you pick up the grinder - decide which of those two situations you are in.
