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GTM C14 H-pipe & Header Info/Instructions

GTM®

Administrator
Staff member
GT di Razza Pura
Joined
Jul 1, 2009
Messages
14,708
Location
Malibu
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. 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 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:
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.
 

Mario A

Just got it firing!
Joined
Oct 12, 2021
Messages
1
Location
Cali
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.
 

GTM®

Administrator
Staff member
GT di Razza Pura
Joined
Jul 1, 2009
Messages
14,708
Location
Malibu
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.
 

countryguz

Just got it firing!
Joined
Oct 1, 2023
Messages
18
Location
virginia
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….
 

GTM®

Administrator
Staff member
GT di Razza Pura
Joined
Jul 1, 2009
Messages
14,708
Location
Malibu
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.
 
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