whats the stock pipe size for the 5s-fe? and what size do you guys thinks the best ?
best size pipe - 6G Celicas Forums
Idk the stock size, I would guess its close to 2", but everyone talks of 2.25" or 2.5" no larger, untill u hit a turbo application where many people suggest 3" or more depending on boost etc.
KawiLove