So with a LSD ex wavetrac or other.
What would you recommend and will it interfere with the XDS+ system? Have been thinking over the LSD since my last car but never took the plunge...
It won't adversely interfere with the XDS+ or any other systems.
What you are doing is removing the existing open diff in the diff case & replacing it with a mechanical LSD which fits in the same place.
Because it controls, the power/torque transfer to the wheels before any other existing devices (eg Haldex units or ABS sensors as used for XDS+) then it actually put less strain on those devices which are further down the drivetrain from the engine.
You may find that those existing devices are "used" way less.
If in UK I would say Quaife...in USA reading reports people go for the Peloquin as its gear based...but its down to personal preference
Quote from Quaifes website:-
""Fully compatible with manufacturer electronic traction control and anti-lock braking systems, the Quaife ATB differential offers a number of key advantages in both functionality and service life compared to conventional plate-style LSD units.
Silent in operation (even during low-speed parking manoeuvres) the Quaife ATB limited slip unit never ‘locks,’ making it progressive, safe and user friendly. Unlike plate-style LSD designs there are no clutches, ramps, springs or other wear prone components to replace at regular intervals, because the Quaife ATB’s well-proven system of helical gears is extremely durable, plus it’s designed to use standard transmission oils.
This makes the Quaife ATB limited slip differential a genuine ‘fit and forget’ upgrade that offers compromise-free performance and unbeatable reliability on the street, strip, stage or circuit, ""