This is the Lancia Delta Integrale used by Per Eklund and his codriver Jan-Olof Bohlin in the 1990 Lombard rally of Great-Britain. The car was sponsored by Clarion Team Europe with its distinctive yellow color, which Eklund used on his cars for a considerable part of his career.
Here are some great pictures of the car:
He is how the car looks ingame:
To install, simply unpack the "ldi" file in your "cars folder". It replaces the first livery which is Carlos Sain's Repsol car.
I hope you enjoy!