Yahoo Message Number: 97913 (http://groups.yahoo.com/neo/groups/Country-Coach-Owners/conversations/messages/97913)
I was at a FMCA rally last week, and Redlands Truck was selling a straight thur muffler and a K&N air filter for improved fuel mileage. Has anyone tried this on a ISX 600HP Cummins? Thank you
Steve
'08 Magna #6879
Yahoo Message Number: 97918 (http://groups.yahoo.com/neo/groups/Country-Coach-Owners/conversations/messages/97918)
Steve,
Last year I purchased a DYNAFLEX Muffler to replace the original Donaldson. The muffler body length I needed was 20", which Dynaflex had but it had one baffle at the mid-point of the muffler so I drilled the baffle nearly completely out. Surprising it didn't increase the decibel level, just a little more throaty sound.
This changed increased my average MPG by 0.5 to 1.0 MPG plus an increase in Boost Pressure. I have been using an AFE performance Oiled Air Filter just after I purchased the coach new..
2003 Allure 1st Ave. #30898 ISL 370 chipped to 400 hp. 135,000 miles.
If you can't find a straight through Muffler in the length you need, look for a straight through Resonator it will accomplish the same thing.
Thx. Mike
Yahoo Message Number: 97977 (http://groups.yahoo.com/neo/groups/Country-Coach-Owners/conversations/messages/97977)
Mike
Thank you for the only reply and the tip on Dynaflex. Dynaflex is near me, so I will call them for more information.
Thanks again
Steve
08 Magna 6874