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Hello all and welcome back to another tutorial. I hope you have been well, if you are reading this, we have a video detailing the process just below, and below that we have a write up for those who prefer some good reading material. Today we will be installing the Option B Blue Seats into the S15 Note: Most seats out of all S Chassy's are compatible with one another. If you have an old 180, 240, s13, s14, s15, then all the seats are interchangeable as the rails remain the same. So you can swap new seats into your old car, or if you have a nice set of aftermarket seats, and you're buying a new silvia to sell your old one, then you can slap them right into the new one. Now let's proceed with the installation. If you have aftermarket seats, then you will need to make sure you purchase S-Chassy rails, the bride rails sit well in the s15 and are a nice option. Step 1: You will need to remove the old seats from the car, this is quite straight forward. You will need a socket set, from memory i believe the size of the bolt was 12mm but i cannot remember exactly, as long as your set ranges from 8mm to 18mm you should be fine Step 2: Locate the 4 bolts on each seat. You will find that there are 2 on the floor under the front of the seat, and when you move the seat forward, there are 2 at the back you will need to remove, one will be on the floor and the other against the transmission tunnel. Step 3: I recommend unscrewing the front bolts until they are barely still in the hole, and can be removed with fingers, then sliding the seat forward to remove the rear ones and then you can reach underneath and undo the front ones. but, this is just how i did it, you find a way that suits you Step 4: Tilt the seat backwards, you may see 1 or 2 connectors under there. Most people will only have 1 connector which is used to check if your seatbelt is plugged in, you will need to unplug this to remove the seat. Now you might be special, and have 2 connectors, this is not very likely, but if you are, shoot me a PM if you're removing your seats and you have that yellow connector you have an extra step that needs to be taken Step 5: Gently remove the seat from the car, without breaking anything or scratching anything. Step 6: You might notice that your new/old whatever seats do not have the seat belt buckles on them, before you put them into the car, it would be a good time to remove the buckle off your old seat, and attach it to your new one. should be the same size bolt which is used to anchor the chair to the ground. Step 7: Gently install the replacement seat into the car and pretty much repeat steps 4 to 1 in reverse order. (Again, for those of you with the yellow plug, PM me for step 4.5) Step 8: Make sure all the bolts are nice and tight because this is what saved you from flying through the windshield at a sudden stop or crash Step 9: You're done! If you enjoyed this tutorial, you should consider checking out my other ones. I have quite a few videos focusing on aesthetics for the s15 and i plan to release a few more in the near future. Please also feel free to check out my channel for video guides and vlogs. Thanks for your time. Peace!