NA exhuast upgrade

91ma70 · 05-26-2010, 03:53 AM

Hey guys,

i know from researching our forums that the general consensus for a NA is to get 2.5 mandrel bent piping out back but i was wondering does the tip diameter going to matter. For example a 3inch dual outlet? Also on the CA models the car comes equiped with the 3 way cat system, which is restrictive right? Is it best to remove them and put a single cat on, since emission is required in cali?

05-26-2010, 03:53 AM	#1
91ma70 3" Exhaust Join Date: Feb 2010 Location: Irvine/Lancaster CA Posts: 61	NA exhuast upgrade Hey guys, i know from researching our forums that the general consensus for a NA is to get 2.5 mandrel bent piping out back but i was wondering does the tip diameter going to matter. For example a 3inch dual outlet? Also on the CA models the car comes equiped with the 3 way cat system, which is restrictive right? Is it best to remove them and put a single cat on, since emission is required in cali?