Thanks a lot for all of the help and the replies. I am using blue thunder 20 % and an Mc 9 plug, the cluth is brand new and the gearing is the one that comes with the car ( original ), well i would like to improve the bottom end becauce tracks in hear are very small. Also i dindnt understand the thinh of getting the waller adapter, do you mean to put an extra piece to the header to make it longer? Thanks a lot for the help

Marcelo