The traction controls will limit the acceleration on an Xi and limp when throttling hard because the system thinks that there is a malfuction because the sensors are not responding when deleted. You have to disable traction controls when you start to bypass this, also not reccomended.
I just copped a set because I can't live having to bypass the DTC and 2 daskbord lights.
Get them non-oem new from Sean@PYSpeed, think he is priced $170 shipped. Most members sell between $120-190.