Gamers and fans of the No. 15 Rahal Letterman Lanigan Racing AERO™ Advanced Paint Technology livery will be able to race the famous Honda-powered IndyCar driven by fourth-place finishing Graham Rahal on Forza Motorsport 6 for Xbox One! The livery is being made available for gamers to download and play on their systems in the world's most successful auto racing franchise. 

http://www.forzamotorsport.net/en-us/news/fm6_launch
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EXCLUSIVE FREE OFFER:

If you’re a gamer and would like to get a sneak peak FREE download from Xbox, please follow the instructions below and you too can drive what Graham’s driving in Forza 6!!

Forza Motorsport 6 download codes:

W6G6W-DF667-WH3J9-VP2DY-XD7GZ
K4VKW-432FJ-G4THJ-YQJWJ-TDRMZ

Download instructions:

1)            Start up the Xbox One and sign into your Xbox Live account.
2)            Scroll to the “Store” page and select “Games” under “Categories”
3)            Choose “Use a Code” from the left-hand menu.
4)            Select “Or enter the 25-character code” and press A
5)            Enter the code in the bar and press Enter.
6)            The game should unlock and immediately begin downloading.