Comparison of Aftermarket Muffler to Stock 038AV Muffler

[RES]

I recently purchased an aftermarket (Made in China) muffler for my Stihl 038Av to convert from a single port to a dual port. Here is a comparison of the two mufflers. The inside shells looked fairly similar. The outside shells showed some differances. On one side you can see that the China muffler is not as deep and lacks a series of vent holes. On the other side you can see that the port slots are not as long and neatly cut. One slot is too close to the edge and is not cut through enough to provide venting for the exhaust. I will have to open up those slots to gain the required port size. Was it worth $29.95 vs. $99.00 for the original equipment?

 

[Rookie1]

Id rather modify a China part than a good Stihl part. I cant see why it wouldnt be good enough for that application.

 

[RES]

Overall, once I clean up the two slots on the one port, it should be OK. The other port looks acceptable.