I'm located in the Toronto area and am looking to change my exhaust from 2.25 to 2.5. Can anyone suggest a shop in the Toronto area who specialize in mandrel bends for a reasonable price? Also, my setup will be as follows:

AEM CAI, Vibrant JDM 4-1 Header, High Flow cat, Titanium exhaust.

Would going from 2.25" to 2.5" decrease my power or increase it? I'm not planning on any power adders in the future.

Thanks!!