Question about header outlet size and system diameter - Toyota Yaris Forums

Shinare · 12-09-2010, 11:38 PM

OK, I'm a complete novice about these things but since catching the yaris upgrade "bug" several months ago after finding this site, i've been looking to do things I can afford to my yaris to make it more my own and a little more "peppy". (by afford I mean from the standpoint of a 37 year old father of 2 living paycheck to paycheck, hehe)

I've been looking at ways to "cheaply" upgrade the breathing and exhaust. I want to do a full exhaust system. Looking around I see lots of things that advertise exhaust diameter as "the bigger the better". BUT... it seems that every exhaust header I've seen on ebay that advertises the outlet diameter all say 2". Do all headers have an outlet of 2"?

If so, if the header restricts your exhaust flow to 2", why would you need any other part of the exhaust to be bigger diameter?

12-09-2010, 11:38 PM	#1
Shinare Bronze bombshell yaris Drives: 09 Yaris HB 3door Join Date: Sep 2010 Location: Oklahoma City, OK Posts: 641	Question about header outlet size and system diameter OK, I'm a complete novice about these things but since catching the yaris upgrade "bug" several months ago after finding this site, i've been looking to do things I can afford to my yaris to make it more my own and a little more "peppy". (by afford I mean from the standpoint of a 37 year old father of 2 living paycheck to paycheck, hehe) I've been looking at ways to "cheaply" upgrade the breathing and exhaust. I want to do a full exhaust system. Looking around I see lots of things that advertise exhaust diameter as "the bigger the better". BUT... it seems that every exhaust header I've seen on ebay that advertises the outlet diameter all say 2". Do all headers have an outlet of 2"? If so, if the header restricts your exhaust flow to 2", why would you need any other part of the exhaust to be bigger diameter? __________________ Now I drive a CARMINE RED METALLIC 09 Yaris 3-door!! I'm Back!!! WooHoo!! Mods done so far: Tinted windows, Viper 211HV Remote Keyless Entry, Atoto Android headunit, backup camera, steering wheel controls Before it was totaled I drove a 2007 Black Sand Pearl 3 Door Lift-Back M/T with 49k miles. Stock Everything except for black tint, all red badges, red dash, and stealth garage door opener. Ultra-Gauge mounted on steering wheel. A1 Electric MES Central Locks and Avital 3100 Alarm system.

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Electrical System Upgrade Advice	sqcomp	In Car Entertainment + Electronics (audio / video / alarm)	6	03-23-2016 02:15 AM
The Nitrous Thread	ChinoCharles	Performance Modifications	116	02-16-2016 04:07 PM