Fast and the Furious 6 & 7 were filmed together and tie directly into one another. There's a big reveal at the end of 6 which is pretty awesome. But if you don't want the end of a movie that isn't out yet to be spoiled... don't read the spoiler. This is from http://www.aintitcool.com/node/60983
At the end of FAST & FURIOUS 6, the crew has helped Hobbs (Dwayne "The Rock" Johnson) in dispatching of Luke Evans' Owen Shaw, earning their full pardons, enabling them to return back home, with Dom (Vin Diesel), Brian (Paul Walker) and Letty (Michelle Rodriguez) all seemingly ready to live the rest of their lives free and happily ever after.
Now this is where the big reveal comes in. As it was structured when I cemented this information, the following sequence was placed immediately after that peaceful ending, but it's entirely possible that it may be shifted to occur sometime during the end credits, much like the reveal of Letty still being alive was during FAST FIVE.
We then see a pair of hands on a steering wheel, with Japanese suddenly coming across a police scanner in the car. In addition, looking around the car, we see that the inside of this particular S-Class has been reinforced for some reason. The scanner puts out the call for all units to respond to a high-speed chase taking place between an orange and black Mazda RX-7 and a grey Nissan 350Z, and this suped-up Mercedes floors it, taking off from its parked position.
This mysterious driver monitors the chase from a parallel road before geting ahead of the pursuit. At this point, he heads down a street on his left at an incredibly high rate of speed. Upon seeing the RX-7 approaching the coming intersection, the driver floors it, timing his entry into the intersection to slam right into the side of the Mazda, sending it rolling over upside-down, as the S-Class appears only minimally damaged.
This mystery driver then steps out of the vehicle, and it is now that we finally learn who is behind the wheel...
Are you ready for it...?
Statham, playing Owen Shaw's older brother Ian, walks up to the RX-7 and over towards the driver of the vehicle, which we now see is Han (Sung Kang).
BAM!! DOUBLE WHAMMY!!
We now see that we are right smack in the middle of THE FAST AND THE FURIOUS: TOKYO DRIFT.
Statham tosses his brother's SAS dog tags into the car, next to the trapped and helpless Han, and, as he walks away, he pulls out his cell and makes a call, calling Dom. Very briefly, as Han's car explodes in the background, much as it did in TOKYO DRIFT, Statham's Shaw warns Dom that he doesn't know him, but he's about to... and, as he walks into the gathering crowd unnoticed, FAST & FURIOUS 6 ends, and we're right on the doorstep to where FAST & FURIOUS 7 will take off.