[87_SR5]

87 sr5 ext cab w/ 22RE

So I am finally going to get a new muffler on my truck...after commuting everyday my rusty old muffler isn't cutting it and I could use a new tune.

Anyways, I thought I would run my idea by here to see what you guys think. I am going to order a Dynomax Super Turbo muffler...in my price range and I have read about others liking it. Other suggestions?

My plan was to scrap everything from the cat back, and install the muffler directly after the cat...and dump the exhuast immediately after that. Or, I am also leaning toward removing the cat and basically putting the new muffler in its spot, and dumping the exhaust right out the muffler.

This would be a very simple installation...no need for outside help since all I will need is my MIG (ie no tube bender). There is also the exhaust hanger right behind the cat which will be easy to utilize.

My concerns: mainly noise. Do you think I will regret dumping the exhaust under the truck (near the end of the cab/beginning of the bed)? I'm sure it will be louder in the cab than if I ran the exhaust all the way back...but I want to see if anyone else has done this before.

Here are some pics of my current setup...notice the cheapo muffler that is rusted through.

 

[kamesama980]

it will definitely be louder than leaving at the bumper, not grossly so. how much depends on the muffler you use. losing the cat will make a significant difference too.

 

[fourwd1]

Do you have to pass emissions tests?
Do you like exhaust fumes in the cab?

 

[Twisted Sid]

do you want your ass to vibrate?

 

[87_SR5]

No, No, and...it depends.

It was just an idea...a modification I could do myself without taking it to an exhaust shop. And I know a shop will not remove my cat, legally.

Most of my exhaust is currently coming out of the inlet to the muffler (you can feel it hitting your leg if you are standing by the truck), and I haven't noticed any fumes in the cab. But something to think about...thanks for bringing it up.

I wonder if I get the muffler mounted in place of the cat, will a shop complete the work and run the exhaust out the back? Or do you think they won't even touch it since it doesn't have a cat?

 

[killer01Ws6]

They are all correct..
On your last question... if you have it welded up and installed when you drive it up and all they have to do is bend and extend the pipe.... I bet they will never give it a second thought.

 

[IronNam]

Pretty much what Sid said lol.

I say leave the cat on, you'll appreciate some backpressure. Put the muffler on right after.
And I say extend the pipe and end it somewhere after the cab, before the axle.

kinda what I'm runnin

 

[trailrider9]

Idk bout all shops or any other shops but I know my uncle owns a exhaust shop and we ran my exhaust after hours. But normally he will not cut anybody else's off and if it already doesn't have one on it then he wont do anything at all to the car without putting one on it. Maybe u should call and check with the shop u would use without telling them any information about u or ur truck and just ask about if they will touch it without putting a cat on it.

 

[IronNam]

most shops won't touch the cat.