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ive built a 365sbc with a extreme energy 262 cam with vortec heads. would i get any more power gain with 3 inch exhaust over 2.5 ? im also using an h pipe. this motor is going in an s10 where my other truck (fullsize) has 3inch exhaust on it and it does better.
 

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exhaust

runn141 said:
ive built a 365sbc with a extreme energy 262 cam with vortec heads. would i get any more power gain with 3 inch exhaust over 2.5 ? im also using an h pipe. this motor is going in an s10 where my other truck (fullsize) has 3inch exhaust on it and it does better.

run a 2.5" exhaust. with a 262 cam you want your power down low not in the upper rpm range. i run a 3 inch exhaust on my car and it makes over 650 horse and its just fine. i suggest using flowmasters super 40 muffler. a little on the louder side but offer great flow without going to "sewer pipe" sized exhaust. good luck
 

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If you are using headers use a 2-1/2" collector with the 2-1/2" head and tailpipes. No need for a chunk of 3" tubing in the middle of a 2-1/2" system.
 
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