you can bolt the D16A1 to the L3 Si transmission - it doesn't fit perfectly, but you can do it - 4 out of the 5 transmission attaching bolts will fit - only 1 starter bolt will fit, as there is no hole in the D16A1 block for the second bolt - personally, i don't believe it is a good situation, but you can do it and it has been done before - people who have done it say it works just fine