Quote Originally Posted by Ray09 View Post
Its a Japspeed stainless mani. its gets unbelieveably hot in less than a minute.... cannot understand it
I would of said block cat or some sort of restriction in the exhaust but youve stated the cat is off, make sure theres no blockage, and recheck your timing could be a few teeth off ,Could probably pull a diagram from somwhere for the timing mark settings if you want.