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rimpainter.com · 12-26-2006, 09:05 AM

Actually bigger is not better. If the pipe is too big, the exhaust gasses expand and cool too quickly; making it harder to "push" the gasses out of the pipe. What you want is an ideal size and Toyota had this down for a relatively stock engine (2.25). Now, if you are going to go true-dual, you will want to size that carefully as well. Without having the chart in front of me, I believe 1.75 or 2" is ideal on a true-dual (with a 3.4L-equipped) engine. Don't quote me on that though.

12-26-2006, 09:05 AM	#3 (permalink)
rimpainter.com Contributing Member Join Date: Jan 2003 Posts: 10,797	Actually bigger is not better. If the pipe is too big, the exhaust gasses expand and cool too quickly; making it harder to "push" the gasses out of the pipe. What you want is an ideal size and Toyota had this down for a relatively stock engine (2.25). Now, if you are going to go true-dual, you will want to size that carefully as well. Without having the chart in front of me, I believe 1.75 or 2" is ideal on a true-dual (with a 3.4L-equipped) engine. Don't quote me on that though. __________________ www.rimpainter.com Get your O Gasket Mod Here! My SC'd 4Runner's Profile My YouTube vids Last edited by rimpainter.com; 12-26-2006 at 09:38 AM.