DIY Replace Back Muffler / Resonator with Straight PipeSubject: DIY Replace Back...
DIY Replace Back Muffler / Resonator with Straight PipeSubject: DIY Replace Back Muffler / Resonator with Straight Pipe
Title: Increase Fuel MPG by Replacing Back Muffler
When your back muffler fails, and or if you want a bit more gas milage, replacing the back muffler with a straight pipe seems to work fine and increase MPG. This is much cheaper than purchasing a back muffler with DIY or to have a local customer shop install a straight pipe.
Back muffler failing, onion peeling and / or holes in the back muffler.
Hack Saw, Ratchets, Wrenches, etc.
About 1 hour:
Pipe parts from local auto store. Exhaust sealers, hangers, pipe tip (stainless)
Remove the back muffler by cutting the pipe before the muffler about 2 inches in front of the muffler. Replace with straight pipe components or have a shop do it. You will need some time to get it 100% right. It took me a couple of tries.
- Money savings in replacement.
- Slightly louder, but not much. Actually a better sound (subjective)
- 1-5 MPG gas savings, especially on open road.
I have done this on a 99 9-5 I4 for about 1 year now and it seems to be working fine. I am getting about 3+ MPG on the open road since this was done. It is an automatic with 140k miles solid 29-30 MPG with regular fuel on the open road. I really do not see the need for the back muffler / resonator at the present time.
I will be doing this on a 2001 V6 wagon soon. The muffler will be failing soon.
on Jan 17, 2010 | Saab 9 5 Cars & Trucks