Hi, im sorta new to toyotas and was wondering what size exhaust I could use if i was to replace the current stock exhaust on a 88 v-6, could i do dual exhaust or should i just do a slightly bigger single exhaust system?

 

2.5 single exh is all you need 4 or 6cyl.

 

Most guys prefer a 2 1/4 (2.25) exh.