Internal Muffler Insert - Available 5in, 6in, 7in & 8in




Internal Muffler Insert - Available 5”, 6” 7” & 8”. This quiet series muffler has bee designed to reduce the exhaust noise component of heavy duty trucks to allow compliance with noise limits set by paragraph 27204 of the California Vehicle code. The acoustical insertion loss of the internal muffler is compared to that of an OEM muffler.

This Muffler Insert will reduce the exhaust noise level to equal that of an OEM muffler. Additionally, this muffler exhibits a 1.55 inch Water Column pressure drop compared to 8.4 inch WC pressure drop of the same OEM muffler at 1000 CFM airflow at 70 degree F.
Buying the Right Part:  To the best of our knowledge, all application information and photos are accurate.  There can be application errors from manufacturers and technical support from time to time.  Therefore, we recommend you do the following to insure you order the correct parts:

1)    Make sure ALL the vehicle information you provide is correct
2)    Feel free to contact one of our Customer Service team members to clarify what you are wanting to order
3)    Compare web photos with your old part
4)    When the part arrives, compare it to the old part prior to installation

Four State Trucks assumes no liability related to product use and fitment.  Buyers are solely responsible to insure that product use and fitment is consistent with their truck or application. 
 

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