For starters, the 230 HP TYPE II engine was intoduced in 1993 on the Coupes. Also, the 230HP engine is only available on the Coupes, and on the 94-95 GS Legend Sedan, not all the Legends.jedmund1 said:
Other than that, getting an additional 20HP to the crank (the 230 is at the crank) is not that hard on a V6 with basic upgrades like exhaust, inatke and headers, chips, and so forth. The problem with the Legend is that there is only a very hard to get header from Japan, and a few custom headers being developed, but not available yet. So, pretty much no headers for the Legend that would yield the largest HP gain. Also, if you went to full port and polish route, 20 HP is very achievable.