Is the stock muffler restrictive?

4strokin

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Just wondering if the stock muffler is very restrictive? Would it benefit me to cut it and weld some new pieces in it place? Is there any differance compared to a after market exhaust?
 
No stock is pretty good actually. Aftermarkets will get you 2-4 HP thats it.
You can save some weight especially with the Excel, although the apex stocker is lighter than the RX was
 
Cut it open and take the guts out. Saved 7 lbs on my RX and sounds pissed off. If you want to talk restrictive.....do an air box mod on the apex. I cut a 3" x 8" hole in my stock airbox and had to go from 137.5 jets to 170 jets!!!! I want someone to try that on the Apex.

t
 


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