Just a muffler swap alone won't change the physics of the exhaust enough to change the mileage by a noticable amount.

 

this is probably a true statement. haha

changing from the flowmaster to the stock muffler I haven't noticed any performance differences. I'm just trying to say if you want your blazer to sound louder go for a new muffler. if you don't really care how it sounds I would say pass on a new muffler and keep the stock one because there really isn't much difference between stock and aftermarket other than the sound.

 

You can get a long Magnaflow which will sound stock but outflow the stock muffler. A 24" Magnaflow in the stock exhaust will sound stock but flow much better, it's straight through. I had one on my truck and with no cat and dumped before the axle, it still sounded stock, that's how quiet it was.

 

Yeah! Thats definitively a great option. The longer it is the deeper the tone will be and quieting it down. You cant go wrong with more flow as long as the piping diameter isent too big and then it will only be hurting you

 

i have a free flowing exhaust on my 96 blazer but i have a hi flow cat as well. i noticed only like 2mpg but i did notice a great gain in HP. i like the sound personally but it is all personal preference. mine is 2.5 inch pipe from a "Y" pipe after the cat and 3 inch chrome tips out the back. i like the way mine sounds.

 

Got any pics and vids?

 

here is a pic i cant get my video to upload

 

So no muffler, just a highflow cat?

 

yup just the cat. i really like the sound i get but the cops dont like it! lol!

 

that sucks u lost ur spair they should have took the time to bend the pipes around it so u still have it! tisk tisk!