22racer,thks a lot for ur time ,good communication u guys are great anyway ,done breaking-in the 3R sitting pretty on my 5T LOL, & i would say wow! smooth power, & excellent run time,i tried the ttr2035 but i missing something the BOTTOM,so my friend make me try his OS 2050 pipe & just lean it little bit more & damn , just found the right pipe ...........i got little concern on the 2 shims ,do i need to leave like that or take out 1 ,any suggestion pls. ,thks