I bought an f4 slip on for really cheap only to find out it doesn't fit the header, I knew the bracket mount was different but figured since it was an adjustable bracket it wouldn't matter.

Is there any way to make this pipe fit or should I ask for my money back? He put F4i parts in the craigslist title then told me it was for an F4 when I drove 65 miles to get it.

 

you need a f4 header