im sure they are 3" i dont think they made the 856 in a 4" coilwhat size coil these take
the first generation HW was,they bought some of their motors from George and some from Bob,which are all made at the same place.yeah idk thought i would ask
i just got 4 o f the SHW and was like WTF here are four more. but they are not the same //content.invisioncic.com/y282845/emoticons/frown.gif.a3531fa0534503350665a1e957861287.gif