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Gonna rip stock exhaust off my 86 glh and replace. Want suggestions from you guys(that have turbo dodged for a long time) what'd be best to replace with from Turbo back...loud(not obnoxious), biggest HP gains is what I'm looking for. 86 Glh that is currently as t1 w intent to up to t2. Thanks so much
 

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3" from the cat back at least I would say, if you can get the downpipe also, I ran a 3" cat back but did not have a cat just a pipe and a Dynomax Bullet for the muffler and I think the sound wasn't to loud, but I got pulled over by the cops and he said that I should go to a muffler shop that my exhaust was busted and too loud, I just agreed with him and said that I would get it fix, laughing on the inside, but you might want to run a bigger muffler to quiet it down some more
 

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don't forget you'll need to bend around the shifter. And getting a 3" up to the stock 2.25" SV is a bit tricky.
 

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Some people may not agree with me, but these are just suggestions you asked for.:p

ALL my cars that have been to my local exhaust shop have had the same system installed, with the exception of size.

Most of my cars get 2.5 inch exhaust, with no cat and a 18-24 inch glasspack style muffler right in the middle of the car. You can't beat a straight through muffler for performance in my opinion. I love the sound and you can definately hear the turbo spool. Don't think it's too loud, as I've never been pulled over for excessive noise.

I also think 2.5 inch is plenty big for most of our cars with a stock turbo. Unless you're putting a heavily modified motor in it with bigger turbo or something like that, you'll be fine with 2.5 inch.

My white Spirit R/T has a mandrel bent 3 inch exhaust with a glasspack style muffler at the very end of it. Not a fan of being able to see the muffler, but it was already done when my friend had the car and it sounds great! So I can't complain.
 

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unless yur future plans exceed 250 Hp then a 2.5" mandrel system will flow plenty, be lighter, cheaper, and easier to install than a 3" ;
hook it up to yur 2.25" DP or try to find a 2.5" DP (20-40$ used from any 89+ TD) ..

meanwhile save up for a 2.5" SV (89 TII or aftermarket) (and the 2.5" DP if not installed yet) ;
when you find them, install and you'll pick up Another 5-7 Hp

if you future plan 250Hp or more then go ahead and put a 3" mandrel system in now with a 2.5" DP and a Flowmaster 2.5"->3" reducer cone,
and save up for a 3" SV & DP ..
 

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Thing is people say, Oh I'm only shooting for 250hp so I'll go 2.5" Then the next thing you know they want 300+ and have to do the exhaust all over again. I like 3" because it's not as obnoxious sounding. 2.5" sounds like a big hand gun going off when it pops and gurgles. 3" is much more mellow and deep.
 

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Thing is people say, Oh I'm only shooting for 250hp so I'll go 2.5" Then the next thing you know they want 300+ and have to do the exhaust all over again. I like 3" because it's not as obnoxious sounding. 2.5" sounds like a big hand gun going off when it pops and gurgles. 3" is much more mellow and deep.
not much you can do about human nature...

but I agree with both points :)

the 3" *will* be deeper sounding.

{I will work on posting a youtube viddie of my 3" no cat no muff omni}
 

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2.5" is the best unless you have a huge turbo like a holset, then id say 3" but if it stock or has a little MOD to it stick with a 2.5".
 

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no i know im new to this site, as i just got my first turbo dodge last week but... im not new to the turbo thing.
it may sound odd and you might just blow it off but what about a remotely mounted turbo for your new exhaust?:headbang:

-instant boost, no lag/very minimal lag
-no need for an intercooler as the charge pipe going to the intake from the back of the car acts as an "intercooler" in itself
-the turbo will be your "muffler"
-frees up some space in the engine bay.

i had a ford escort zx2 with a remote mount turbo, it was actualy a very nice car. i had to get rid of it because it waqs only 2 door, and i have a kid. so i sold it, and now i have a 1991 dodge spirit r/t:thumb:
 

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I agree with chazzy! I had a 240sx with the 2.0 turbo. I took it in to a renown exhaust guy here in town and he said to run a 3in down pipe off a "small" turbo would be a waste of time. You need some type of back pressure to run right. I went 2.5 back to the cat and 3in the rest of the way out!!
 

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you don't need or want backpressure anything above 1.5 PSI is bad, I have heard this a million times you need backpressure, bullshit!
 

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you don't need or want backpressure anything above 1.5 PSI is bad, I have heard this a million times you need backpressure, bullshit!
:bang head y would anybody think any kind of back pressuure is a good thing? The more free flowing exhaust you have, the better. I completly agree with him. You don't need back pressure. I actualt found a 4.5 inch stainless 90 degree elbow I am considering buying and welding on the correct flange to fit my turbo. I found it at fleet farm ;D
 

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Your turbo is your "back pressure". Now running an itty bitty turbo and 3" is a bit of a waste of time as the turbo won't flow enough to make use of it for the most part. But just gives you an excuse to run a real turbo.
 

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3" all the way, with some sort of a straight through muffler. I have a 3" on my 85 GLH with a galvanized muffler on the back, sounds nice and suprisingly not overly loud.
 
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