Its not the TCR exhaust that it the limet, the limit is only adjustment, and i know that he will make it better and better from now on.
"at least 6.3" - OMG. 6.3 is very very fast, even in the Dutch SBO superspecial class with NOS, its often a win of the day.
haha ofcourse is the adjustments the most important to get good times.
He was not happy before he have got to 6,3 i have talked to him, thats why i wrote it
but if you whant the extra you need parts who is good for eatch other8)