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Old Mar 24, 2018 | 08:54 AM
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Default Exhaust Help

Last weekend I replaced my exhaust with new pipes MF mufflers and new tips, all purchased from CC. Everything went in fine and looks good from behind the car except the left side tip. It points down and to the left and looks terrible. Probably 1” down and 3/4” to the left. I feel the small pipe welded to the back of the muffler is not correct.

Does anyone have a suggestion how I can fix this problem?
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Old Mar 24, 2018 | 09:28 AM
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Can you post a photo of it?

Did you weld the tips on? It's best to do the final positioning of the tips with the exhaust system assembled to the car, then weld them on.
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Old Mar 24, 2018 | 10:54 AM
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Originally Posted by 7T1vette
Can you post a photo of it?

Did you weld the tips on? It's best to do the final positioning of the tips with the exhaust system assembled to the car, then weld them on.
That is what I did. I plan on using clamps to get everything right then tack welding so nothing can move.
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Old Mar 24, 2018 | 11:08 AM
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If the original tack welds aren't large a dremel tool with a thick cutoff wheel can remove them. Then you can reposition the tip. If the welds are large you can grind them off with a 3" or 4" diameter grinder/cutoff wheel.
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Old Mar 24, 2018 | 11:50 AM
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Can you take the same pictures but much lower so we can see the positions of the mufflers themselves as well as the pipes going from them forward

To me it looks like there's no way to rotate the drivers muffler to correct that much miss-alignment and that you're probably correct in saying the pipes that CC welded on is wrong
M
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Old Mar 24, 2018 | 12:28 PM
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Originally Posted by Mooser


Can you take the same pictures but much lower so we can see the positions of the mufflers themselves as well as the pipes going from them forward

To me it looks like there's no way to rotate the drivers muffler to correct that much miss-alignment and that you're probably correct in saying the pipes that CC welded on is wrong
M
Here are a few more photos
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Old Mar 24, 2018 | 12:48 PM
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Hard to say
It does look like the muffler needs to be turned counter-clockwise a little more, that would help the centering

But from what I can see, the tip needs to go on another inch or so, even compared to the other side, unless it's just the angle that makes it look like that.

From the side, is the tip sticking as far out from the body as it seems?

Were the pipes on the mufflers the same length?

My CC exhaust (not MF mufflers though) have the pipe almost reaching all the way into the tips, maybe 1/2 or so back as I recall

If it's sticking way out, I wonder if trimming the muffler pipe would allow it to go in and at the same time you would loose some of the bend and that would also lift it up?

The obvious answer would be to return it to CC, depending on when you bought it I guess...
M
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Old Mar 24, 2018 | 01:04 PM
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Originally Posted by Mooser
Hard to say
It does look like the muffler needs to be turned counter-clockwise a little more, that would help the centering

But from what I can see, the tip needs to go on another inch or so, even compared to the other side, unless it's just the angle that makes it look like that.

From the side, is the tip sticking as far out from the body as it seems?

Were the pipes on the mufflers the same length?

My CC exhaust (not MF mufflers though) have the pipe almost reaching all the way into the tips, maybe 1/2 or so back as I recall


If it's sticking way out, I wonder if trimming the muffler pipe would allow it to go in and at the same time you would loose some of the bend and that would also lift it up?

The obvious answer would be to return it to CC, depending on when you bought it I guess...
M
The only way to twist it is at the joint at the cross member by the trans. I can’t do that because the pipe then hits the rear spring. Both of the pipes now set so the flat part of the pipe is where it should be by the spring and have the same clearance to the spring. I am sure the clearance is only about 1/2 inch.

I will call CC and see what they have to say. I may just cut the pipe and with a few angles get it to work and tig it all back together. I just don’t think I should have to do that on $250 mufflers
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Old Mar 24, 2018 | 01:09 PM
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Originally Posted by Mbuschsr
...

I will call CC and see what they have to say. I may just cut the pipe and with a few angles get it to work and tig it all back together. I just don’t think I should have to do that on $250 mufflers


I was thinking about swapping my mufflers to the CC adjusted MF ones but maybe I'll hold off for now

Keep us posted on what CC gives you for an answer
M
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Old Mar 24, 2018 | 02:25 PM
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Originally Posted by Mooser


I was thinking about swapping my mufflers to the CC adjusted MF ones but maybe I'll hold off for now

Keep us posted on what CC gives you for an answer
M
I will cal on Monday and let you know what they say.
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Old Mar 24, 2018 | 10:15 PM
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From the photos it looks like the extension between the muffler and the tip is too long. either that or the muffler is positioned too far towards the rear of the car. Can you measure the difference between the mufflers and the tips on both sides.
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Old Mar 24, 2018 | 10:22 PM
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Or the pipe coming out of the muffler is at the wrong angle.
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Old Mar 24, 2018 | 10:39 PM
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Someone welded the wrong outlet pipe on that muffler. It appears to be too long anyway; so just remove the tip, cut the pipe back as much as is needed, then see if you can position the tip on the 'new' pipe so it fits better. If not, cut that exit pipe off with only 1" sticking out, then weld on a straight piece and set the tip in place.

Good luck.
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Old Mar 25, 2018 | 09:26 AM
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Just my thought M: To me it looks like the lay of the left pipe to the muffler may be the problem. If so, it tends to magnify the misalignment farther back to the tip. I know there isn't much room back there near the Tire Tub for adjustment. It'll be interesting to hear what service you get from Corvette Central.

Steve
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Old Mar 25, 2018 | 02:03 PM
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Default Exhaust tip issue with CC

Originally Posted by Cavu2u
Just my thought M: To me it looks like the lay of the left pipe to the muffler may be the problem. If so, it tends to magnify the misalignment farther back to the tip. I know there isn't much room back there near the Tire Tub for adjustment. It'll be interesting to hear what service you get from Corvette Central.

Steve
M I had an issue with an exhaust I ordered from Corvette Central. One of the tail pipes was crushed that was delivered to me. I sent them pics showing the problem and they said it’s su to be that way and they weren’t going to do anything about it. Basically pound sand.
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Old Mar 25, 2018 | 02:52 PM
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Mine fit like that in the beginning too. I had to spend more time getting it aligned but it did.



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Old Mar 26, 2018 | 07:42 AM
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Thanks for all the sugestions.

I have been thinking about this and decided that I should take another shot at fine tuneing the pipes before I start cutting anything.

Even though I think everything is as good as I can get it I agree that with the compound adjustments things get magnified as you go back. Another pair of hands or eyes may have made it easyer.

I startd on the left side and had a much harder time than with the right side (learning curve) .

I am off on Friday so I am going to try to tweek things and see where it goes.
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Old Apr 1, 2018 | 11:07 AM
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I loosened the clamps on the left side and tried to move things a little. I got it much better than the first time. The only problem is when I put the muffler pipe into the intermediate pipe it seems like I went to far in. The tip is pointing about 1/4” to Far to the left. With the groove in the pipe from the clamp I can’t get it to move at all.
Any suggestions?
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Old Apr 1, 2018 | 10:11 PM
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On my old system (before changing to band clamps) I had to use a pair of "push" clamp between the muffler and the tip to get it off without pounding the crap out of it.

Vaguely like these where you can flip the end around and use it to push stuff apart rather than together



or put a piece of wood against the rear of the tip and tap tap tap with a hammer, one side then the other, lather rinse repeat....
M

Last edited by Mooser; Apr 1, 2018 at 10:11 PM.
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Old Apr 2, 2018 | 01:36 PM
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I pretty much just put in my plans the option to modify whatever I buy....especially if it's mail order. Unless it's totally wrong, and yours does not appear to be, then I just plan to tweak anyway---- minimizes frustration and being annoyed. I mention mail-order because it's a pain to ship things back.

If it was mine (I have the option to cut and weld), then I would not worry too much-- tweak into best position possible, and then make the adjustments necessary to fit to my taste.


Originally Posted by Mbuschsr
I loosened the clamps on the left side and tried to move things a little. I got it much better than the first time. The only problem is when I put the muffler pipe into the intermediate pipe it seems like I went to far in. The tip is pointing about 1/4” to Far to the left. With the groove in the pipe from the clamp I can’t get it to move at all.
Any suggestions?
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