Resleeving is, of course, a HUGE thing when it comes to squeezing more cubes out of displacement challenged four banger Honda engines. But you never hear about this when it comes to J-series - people tend to make due with 89-90mm. This is about as large as people go with resleeved H/K series. But compared to H/K series, J series has a whole four extra mm of bore spacing that could accommodate more. If you could go with, say, a 93mm bore and J37 crank, you could have a 3.9. A 94mm bore (if possible) would get you a 4.0! It is possible to go this big?