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GTM C14 H-pipe & Header Info/Instructions

GTM®

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I pulled this from the cracking exhaust parts thread HERE in this section to highlight info on my crack-proof GTM C14 H-pipe as sold HERE. It also serves as an outline/instructions on how and where to cut below.

Our (soon ending) limited production GTM headers and mid-pipe connectors are linked below to mate to the GTM H-pipe then onto your (our our) mufflers, for those who don't want to cut their stock headers. Our mid-pipes will use your front heat shield, and can be used with your stock or aftermarket mufflers and rear heat shields.

GTM H-pipe:


GTM Headers and mid-pipe connectors;


Connector pipe is squarely cut just forward of the connecter brace:
GTRx Cal14 Disc

This is what you have left, to be re-installed:
GTRx Cal14 Hdr

Install new H-pipe shown, slide onto cut headers with the angle beehive flex joints facing up and outwards:
GTRx Cal14 Hpipe

Questions? Post below.
 
Todd, since I own a limited number of tools for metal I want to ask; On the GTM C14 H, After cutting the pipe, do I need to weld any section or modify pipe diameters in any way?

Thanks,
Mario.
 
Todd, since I own a limited number of tools for metal I want to ask; On the GTM C14 H, After cutting the pipe, do I need to weld any section or modify pipe diameters in any way?

Thanks,
Mario.
Hi Mario, no, plug and play from the post above.
 
I pulled this from the cracking exhaust parts here in this section to highlight info on my crack-proof GTM C14 H-pipe as sold HERE or click on top pic below. It also serves as an outline/instructions on how and where to cut.

I am now also offering all-new GTM headers and mid-pipe connectors HERE (or second pic below)to mate to the GTM H-pipe then onto your (our our) mufflers, for those who don't want to cut their stock headers. The new mid-pipe will use your front heat shield, and can be used with your stock or aftermarket mufflers and rear heat shield.

GTM H-pipe:


GTM Headers and mid-pipe connectors;


Connector pipe is squarely cut just forward of the connecter brace:
View attachment 12970

This is what you have left, to be re-installed:
View attachment 12971

Install new H-pipe shown, slide onto cut headers with the angle beehive flex joints facing up and outwards:
View attachment 12972

Questions? Post below.
I just purchased a 2014 CA 1400 w/2086 miles. Owned a 2003 CA EV1100 for 20 years and have some familiarity with MG. Searching the forums to get up to speed on the 1400 and came across this H pipe concern. Is there something I should look at on my exhaust to see if I have a failing part? Should I tap on it or remove now and do a visual or ??? Is there something about the pipe material that will show metal fatigue to look for?

thx….
 
Is there something I should look at on my exhaust to see if I have a failing part? Should I tap on it or remove now and do a visual or ??? Is there something about the pipe material that will show metal fatigue to look for?
A visual check and inspection is all you can do. You may see cracks, or not. Also pull the front heat shields to inspect the front bungs that are welded on.
 
I haven’t received these yet but I have a question.

What creates the seal here? With no slits cut, a clamp really won’t cause constriction of any leaks. I just cannot see how this makes a tight seal other than you have compensated for a tight diameter fit?

Thank you.

IMG 0557
 
I haven’t received these yet but I have a question.
What creates the seal here? With no slits cut, a clamp really won’t cause constriction of any leaks. I just cannot see how this makes a tight seal other than you have compensated for a tight diameter fit?
It will make sense once you have it. That photo is from 10 years ago now. I can’t recall the mufflers used. I don’t think they were mine (like shown on the bench in the pic). The inlet side has slits and clamps, and the outlet (you circled) is same as stock. So if your mufflers have gaskets and clamps, they are reused. We’ve sold a dozen or so of these over the years with zero fitment issues. ;)
 
Instead of asking here, you should send the question via the email you received with order confirmation, or shipping confirmation if you want Todd directly. He may not see it here. However, yes friction fit works. Mine makes a pop or two while the pipes initially warm (and swell) I suppose. Ran mine for a year this way/ no clamps, and so fast no issues. There is a clamp each side at the end of the flex pipe piece toward the rear of the bike. I also installed the fuel manager system Todd sells, and it fixed so many related issues I was having. Wasn’tcheap, but now this is the most enjoyed ride I’ve had. No regrets.
 
Well, I’m jumping in the pool - mostly 😆!

I have the new PC/AT fueling on the way, a new airbox lid to modify, Mistral cans (I just love the sound of my Mistral pipes), and this morning I ordered GTM’s polished headers. I just cannot bring myself to cut up stock pipes with only 2,600 miles on them. That’s just sacrilege to me.

I intend to keep and ride my Eldorado until I am dead (many years from now I hope 🤞) and I don’t want broken exhaust issues, so, thank you GTM 😄.

I’ll report back on my experience when I get her setup and get to ride her in the spring.
 
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