Guys with 3” homemade exhaust, let’s see it

[JBeezy]

I’m trying to decide if I want to bolt up the stainless works headers to my stock exhaust or go ahead and build a 3” exhaust from headers out. Those of you that have done that, can you give me details and cost?


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[cheapthrillb2]

I typically buy the Speedway motors exhaust kits. Done them on a few rock crawlers, my jeep, and my car.

[JBeezy]

I typically buy the Speedway motors exhaust kits. Done them on a few rock crawlers, my jeep, and my car.

Any pics of how you ran the tail pipes from the mufflers?


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[cheapthrillb2]

I didn't put a tailpipe on my car. It has a turn down after the muffler. But it also has a boost referenced loud valve near the front.

I imagine packaging 3" tailpipes around around the watts links and air bags is a bastard. I had previously used the impala ss 2.5" tailpipes slightly modified to fit.

[JBeezy]

I didn't put a tailpipe on my car. It has a turn down after the muffler. But it also has a boost referenced loud valve near the front.

I imagine packaging 3" tailpipes around around the watts links and air bags is a bastard. I had previously used the impala ss 2.5" tailpipes slightly modified to fit.

I’ve heard of some say they ran it under the rear end.


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[Ambitious1]

A couple of members have done a real nice job with their exhaust system. These may help you:

https://www.mercurymarauder.net/foru...ad.php?t=98512

https://www.mercurymarauder.net/foru...ad.php?t=25563

https://www.mercurymarauder.net/foru...d.php?t=106010

https://www.youtube.com/watch?v=Orj3...ature=youtu.be

https://www.mercurymarauder.net/foru...ad.php?t=40681

https://s120.photobucket.com/user/Lo...art=all&page=1

[musclemerc]

Here is mine:
https://mercurymarauder.net/forums/s...d.php?t=106292

[JBeezy]

Here is mine:
https://mercurymarauder.net/forums/s...d.php?t=106292

Dam that’s nice. Good work! My buddy is great at fabricating, but I’m not sure if he’s capable of doing all this.

What are the down falls of simply connecting the SW exhaust to the small factory mid-pipe anyway?


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[musclemerc]

If your NA no down fall.
SC'ed is another story.
The stock midpipe necks down to 1-7/8"

[JBeezy]

If your NA no down fall.
SC'ed is another story.
The stock midpipe necks down to 1-7/8"

Well d*m. I’d at least need to go to 2.5” huh...


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[musclemerc]

I would.....

There is another area that necks down to 1-7/8" too.

Just before and just after the mufflers.... Inlet/outlet

[JBeezy]

I would.....

There is another area that necks down to 1-7/8" too.

Just before and just after the mufflers.... Inlet/outlet

That’s horrible. Thanks for the info. We have a 2.5” x pipe that came off a crown Vic I think we were talking about using since it’s there. I also have a set of 2.5” Magnaflows in the garage.


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[musclemerc]

Unless your plan is to make a lot of boost you should be OK with a 2.5" mid pipe.

The over the axle section is 2-1/4"

[JBeezy]

Unless your plan is to make a lot of boost you should be OK with a 2.5" mid pipe.

The over the axle section is 2-1/4"

That was the plan but reality hit and the need for extra fuel and now much larger exhaust is holding me back. I will do these things later. Right now I’d like to make around 500 - 550 rwhp. I’d be happy with that.


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[blazen71]

I would think you'd be ok with 2.5" mid pipe, 2.5" mufflers and stock tailpipes. If you're on a budget that'd be the way to go since you have the parts already.