hi guys

i have a scoobysport group N decat downpipe and scoobysport decat centre section and a backbox that just says STI on it can someone tell me

1 WHAT BORE SIZE THE SCOOBYSPORT SYSTEMS ARE??

2 WHAT MAKE OF BACKBOX IS?? AND WHAT BORE SIZE??

thanks in advance

cheers

nick.

 

bttt

 

If it is a group N system then should be 2 1/2" Measure the decat section as a check.

Backbox is made by Subaru (STi Backbox)