How much gas mileage does it improve for a 98 Ram? How much does it cost to get instalation because im thinking about getting one off ebay! Does anyone know the general price im looking at?

 

Welcome to the forum!

I just had my entire exhaust replaced from the manifolds back past the muffler. I got the Magnaflow Direct fit Catalytic Conv. from Summit racing and then had a Flowmaster installed.

My 98 was found to be missing an o2 sensor on the drivers side. Sometime in the past, before I bought the truck, someone had cut the wires to that O2, and I guess replaced the exhaust also since no o2 bung was on the old down pipe. Double check yours.

The shop that installed the muffler had to: 1. Order a new harness for the o2. 2. Order a new o2. and 3. Install a new bung on the new downpipe that I put in with my cat.

All that said, it hasn't improved my mileage yet. I think my computer is still adjusting to the new stuff being added and will take a little while (doesn't help that I had to disconnect the battery yesterday to replace the starter either).

But I can tell you this, maybe mileage hasn't improved, but when I hammer the throttle people on the sidewalks tend to move out of the way!!!

 

I bought a flowmaster system off of ebay a few months ago. It consisted of an extension pipe, muffler, dual rear pipes and two stainless steel tips. The system itself was about $180. Installation took about two and a half hours. It took more time to get the rusty old system off than it did to put the new one on. If you have a sawsall and basic hand tools, you should be able to do the install yourself. If you have a welder, it is a plus b/c if you can weld it, all of the clamps will not be showing.

 

huh gas mileage. mine went down to like 8 mpg. not up. only on because im reving the hell out of it though

 

Me too. My city mileage went in the toilet from hitting the gas to hear the new muffler. But on the highway, I did see a gain of 1 or 2 mpg since I put on the exhaust system.

 

So there really no gas mileage improvement with the flowmaster? Is there any other Wxhaust system that does improve or anything?

 

there is an improvement..its just hard to see it b/c you get a suden case of leadfoot-itis.... a common desease linked to modding the rams... hard to see and mpg improvment when your romping on the gas a good 3 tanks to feel the new power

i saw around 1-3 mpg's when the new duals were on...and then i put the second system on with headers and found close to 4 on avg....about 3 months later that is.

rangers huh? dont know why im helping ya... im a sabres guy myself... just kidding

 

I got the same ebay exhuast. It isn't the greatest sounding exhaust. The magnaflow sounds better. I just bought a 3" resonator pipe to put in front of the muffler to see if that will change the tone a little and improve the sound. we shall see.

 

i went with a flowmaster 40 series on my 96. sounds amazing, performance is noticeably better, but the mileage is so so. there was a difference the first tank, but then winter came also find myself flooring it alot more now.