if you are already changing pistons and rods, and own a die grinder the cost is the same for 5.7 or 6.0" rods. Personally i like to run the 6" ones. but what i do with them isnt your daily driver. I think this subject could be argued for a while. For the record, I dont use them for a HP gain. Just to decrease angle. Plus its fun to say i have a long rod. HAHA