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Engine - General, Exhaust & Induction Topics about the general engine items, exhaust system discussed here & Improving the intake tract - air filter to intake valve.

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Old 03-05-2008, 12:16 PM   #1
Side Exit Exhaust?  
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Hey all...

I want to turn the exhaust on my Daytona into a side-exit system. It is a 2.5" catless system with some kind of stock-ish muffler on it. It idles deep but not very loudly.

After looking under the car I see that the pipe makes a bend and comes over on the drivers side just forward of the rear wheel. It then turns again, goes over the axle, and out to the muffler in the back.

I'm wondering if anyone has tried a side-exit system before? I plan to cut off the piping where it comes closest to the drivers side of the car and put a tip on it there. As far as a muffler goes I'm looking for a 2.5" canister style one that will tuck up in the "tunnel" underneath the car... much like a resonator on more modern vehicles.

Any suggestions?
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Old 03-05-2008, 12:32 PM   #2
Re: Side Exit Exhaust?  
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ke6960 is keeping the peace
a bunch of people have side exits... search the exhaust section...


what are the laws in nc as far as cats/no cats.... alot of states you absolutly have to have one.... you should check into it
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Old 03-05-2008, 12:40 PM   #3
Re: Side Exit Exhaust?  
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Oh the law says I should have a cat... but cars made prior to 1991 are exempt from emissions inspection. The only thing I really have to worry about is if the mechanic decides to crawl up under the car and look around. But honestly, the way this thing looks right now I doubt they will bother.

If I have to I'll just find an old 2.5" cat and gut it... since they won't "sniff" the tailpipe... it won't matter.
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Old 03-05-2008, 02:12 PM   #4
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I'd check into the laws about the side exit exhaust as well. In Pennsylvania, the exhaust must exit behind the rear wheel not anywhere in front of it.
I had to redo an exhaust once because of that, because it was visually obvious, the mechanic didn't care about the not catalytic but the duallys sticking out in front the rear tires were a no no.
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Old 03-05-2008, 02:43 PM   #5
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The 3" on mine is a side exit. Exits right in front of the rear tire. Use a Dynomax Bullet, they make it in 2.5". I installed it a few inches before the first 90 degree bend and its tucked up into the tunnel. You might have to clamp a section of pipe on when you cut the exhaust off before the second bend unless you can find a really long exhaust tip.
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Old 03-05-2008, 02:44 PM   #6
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Interesting- I'd like to see the inspection code on that. Being a former licensed inspection mechanic in PA, I can tell you that was total BS.

I had side exit exhaust on TWO of my street-driven, PA inspected (not by me) cars with no issues.

I'm not trying to be argumentative, and it's not you I'm annoyed with. It's these so-called mechanics that reinterpret the inspection code at will...

To the original poster- I actually built mine out of bends from the speed shop (easiest way to get mandrel bends). I ran it out straight from that section before the over-the-axle bend, and put half a 90 bend (cut at an angle) on the end of it to turn it slightly down and back.

It can be quite loud on the highway (depending on RPMs and if you're running next to a Jersey wall...), but most times it's fine.

As a side funny story- on the way back from SDAC8 I got pulled over with the car, and the trooper asked me to please shut it off because it was blowing gravel all over his boots... :)
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Old 03-05-2008, 03:00 PM   #7
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Wait... don't stock ford lightnings have side exit exhausts in front of the rear tire?

There are no regulations in NC about where the exhaust comes out... as long as I have a muffler on it I should be fine.
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Old 03-05-2008, 06:33 PM   #8
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Here a old pic of my current exhaust setup on my shelby charger. I'm running no cat with a 3" glasspack it isn't very loud.
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Old 03-05-2008, 07:06 PM   #9
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Quote:
Originally Posted by RaineMan View Post
Wait... don't stock ford lightnings have side exit exhausts in front of the rear tire?

There are no regulations in NC about where the exhaust comes out... as long as I have a muffler on it I should be fine.
I never understood that myself. Mass supposedly has an over the axle reg but a stock 6 cylinder F150 exits before the right rear wheel. ???

I ran a 3 inch side exit for awhile and got sick of it. I did it more to save the weight of the full exhaust system. I bought mandrel bends and had an exhaust shop put it together. Short money.
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Old 03-05-2008, 07:08 PM   #10
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Timmay2 is keeping the peace
There is a law for where the exhaust exits.

The law is the exhaust must exit behind the passenger cabin.

This is ok for the ford lightning for its cabin is ahead of its exhaust.

It is not ok for a passenger car, as a side exit in front of the rear wheel is still in the vicinity of the cabin.

Reason being- exhaust fumes entering the cabin.

Whether or not your vicinity chooses to enforce it, all depends on those inspecting. But it is a real law.
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Old 03-05-2008, 07:20 PM   #11
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Lots of places have them, this was the easiest to find but its for austrailia:

Exhaust systems

5. The system terminates behind the last body panel.

8. Side exhaust systems (sometimes called lake pipes) are not permitted.
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Old 03-05-2008, 07:50 PM   #12
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I have a full 3" exhaust/swingvalve on mine with a 3" Dynomax muffler. I haven't driven on it yet since my steering column seems to have broken :( but it does seem a little ricey but it also doesn't sound like a honda with a 4" muffler it keeps it in control. Mine is pretty custom made though since I used vbands on my homemade swingvalve and therefor also have a 3" flex pipe section in. Certainly a lot more tame than running open swingvalve though, although the exhaust sound was amazing at 14psi
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Old 03-05-2008, 10:26 PM   #13
Re: Side Exit Exhaust?  
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GLHNSLHT2 has really helped outGLHNSLHT2 has really helped out
Was gonna mention the F150's.
3" side exit straight pipe on my Tona.
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Underneath
DSC01358_1
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Old 03-06-2008, 02:27 AM   #14
Re: Side Exit Exhaust?  
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street_racer is keeping the peace
man oregon deq sucks they test cars from like 1976 and up. and they check for a cat and also test for sound. my csx-t failed for being to loud with 2.5 inch with cat but no muffler.
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Old 03-06-2008, 07:49 AM   #15
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No muffler... yeah... it's gonna be loud.

I'm not gonna bother doing the exhaust until after the inspection... I figure that'll give me a year with it on anyways.
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