i tell you what guy's, that must have been EXHAUSTING work making them. yeah bring on the 4 cylinders. heck why not all electric. introduce tesla only class. the tesla series will feature chicken wire 1 metre above the cars and the cars would have poles constantly touching the chook wire, and they would have rubber around the outside of the bodywork, and they would have to measure your height before you raced and the people would be so bored cause SOUND is and is an integral part of motorsport (aparently not any more) that they would not want to watch the things anymore. v6's is as low as i go everyone. i know i sound like a dinosour but the world is so sanitised a little roar or bark every now and then is good medicine for people to get their "caveman" out. peace out yo!