Hi guys I have a ba xr6t on custom 10psi tune with injectors zorst and monza fronty and I was wondering if I get rid of the crossover and just replace it with the process west crossover off the throttle body and 2 1/2 inch piping to the standard piping underbattery and then just run 3 inch off the turbo back to the same place its meant to sit should I need a retune also will it cause boost spike cheers ..LAT45