exhuast headers?? - Toyota Yaris Forums

jmagdiel · 06-06-2009, 06:39 PM

Once upon a time were all the exhaust manifolds were made of cast iron, with short runners and mismatched ports and the first step for better performance and miliage were the headers. Then you have to enrichen the mixture because of the increased excavenging lean the mixture too much.

Now nearly all new cars came from the factory with tubular exhausts, but still too short for some real advantage, as they are a compromise for cheaper manufacturing.

So far the only header for the Yaris that will bring some advantage is the TRD one, but this one is really expensive.

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Are We Still Stuck With the 4-1 Headers?	Sabretooth	Performance Modifications	31	02-20-2009 08:57 PM
CAI or headers first?	botchilah	Performance Modifications	19	02-18-2009 03:49 PM
MEGAN HEADERS! < group buy price!	C2AUTOSPL	Sponsors Classifieds Area	20	09-17-2007 01:54 PM
headers echo	rayrayII	Southeast	0	09-11-2007 02:53 PM
Megan Headers Install	whooppee777	Performance Modifications	6	07-21-2007 11:14 PM

06-06-2009, 06:39 PM	#7
jmagdiel View User's Garage Drives: 2009 4dr LB Join Date: Apr 2009 Location: San Juan, Puerto Rico Posts: 6	Once upon a time were all the exhaust manifolds were made of cast iron, with short runners and mismatched ports and the first step for better performance and miliage were the headers. Then you have to enrichen the mixture because of the increased excavenging lean the mixture too much. Now nearly all new cars came from the factory with tubular exhausts, but still too short for some real advantage, as they are a compromise for cheaper manufacturing. So far the only header for the Yaris that will bring some advantage is the TRD one, but this one is really expensive.