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  • 1 Post By Ron61
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  • 2 Post By Dwight
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  #1 (permalink)  
Old 12-23-2018, 05:50 AM
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Default Headers?

Are there any other companies besides Iconic that sell headers for Cobra's?
I have a BackDraft with a 351, "slip on" side pipes that are held on with springs.... Rattle, rattle, rattle. Weld on flanges would be the next step, just don't have anyone around that I'd trust.
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  #2 (permalink)  
Old 12-23-2018, 06:00 AM
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Ron,

You might check with Kerry Peterson and Richard Sanders in Omaha. They are both car nuts and mechanics and do a lot of their own work. If worst came to worst they may be able to custom build you a set of headers that will be what you want.

Ron
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Old 12-23-2018, 06:47 AM
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https://www.gpheaders.com/products/cobra-kit-headers/
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Old 12-23-2018, 07:32 AM
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you can buy a tail pipe expander and adjust the diameter of the pipes till they are tighter. I had to do that on my GT 40 bundle of snake pipes.

I have installed flanges on a few slip type side pipes. It's not that hard if you can weld.
I like to use 1/4" plate (5/16" is better) about 6" x 6". Use a hole saw to cut the holes for the pipes. Drill four to six holes for clamping the two plates together. One in each corner and maybe a couple in the middle. The thicker plate requires fewer bolts to clamp together.
Remove the headers and side pipes from the car. Bolt them together and pick a place where you can cut both the header pipe and side pipe into. Remember to check to make sure your new plate will not interfere with anything.
A Port-A-Band is a great tool for this part. Cutting through all four tube (eight pipes) you will remove 1/2" of pipe length for the two flange plates.

Clamp the flange plates in place and tack weld to the pipes. Remove and finish your welds inside and out.
I buy laminated aluminum sheet from McMaster Carr to make gaskets. They work better for me especially if the plates are warped.
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Old 12-23-2018, 07:36 AM
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you are 400 miles away but I could do it if you want to bring the Cobra to me.

Dwight
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Old 12-23-2018, 12:07 PM
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Default a littte far

Quote:
Originally Posted by Dwight View Post
you are 400 miles away but I could do it if you want to bring the Cobra to me.

Dwight
Thanks for the offer Dwight!
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Old 12-24-2018, 06:41 AM
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the tail pipe expander will take the rattle out. You can borrow one from the parts store.
Takes a couple of hours maybe.
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Old 12-25-2018, 08:58 AM
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Quote:
Originally Posted by Dwight View Post
the tail pipe expander will take the rattle out. You can borrow one from the parts store.
Takes a couple of hours maybe.
Good idea .... thanks ....
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Old 12-30-2018, 04:28 AM
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Ron Roberts at Specializing in Superformance after market
you cannot go wrong, great experience
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Old 01-12-2019, 06:24 AM
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Default Expander

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Originally Posted by ront49 View Post
Good idea .... thanks ....
Tried the expander but the metal is so hard the amount of expansion was at best minimal. Not nearly enough to make a tight fit. I used a good quality expander and even with an 18" ratchet it wasn't enough. Maybe if I removed the headers and used a hydraulic expander I could achieve better results.
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Old 01-12-2019, 02:33 PM
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Quote:
Originally Posted by ront49 View Post
Tried the expander but the metal is so hard the amount of expansion was at best minimal. Not nearly enough to make a tight fit. I used a good quality expander and even with an 18" ratchet it wasn't enough. Maybe if I removed the headers and used a hydraulic expander I could achieve better results.
Did you try using an impact wrench instead of the ratchet?
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Old 01-12-2019, 06:56 PM
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Weld the header collector to the sidepipe and be done with it. The slip on will always leak some no matter how tight you get it. Nothing worse than a exhaust leak, hiss, puff & rattle.
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Last edited by studebaker53; 01-12-2019 at 06:56 PM.. Reason: add word
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Old 01-12-2019, 07:49 PM
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Two of these clamps per side should take care of it.

42MM (1.615") Headers should be 1 5/8" or 1.625"
https://www.europaparts.com/exhaust-...91253141a.html

or 45mm (1.77") for the sidepipe slipover area to header primarys
https://www.eeuroparts.com/Parts/378...mp-45mm-45X95/

Don't know which one will work for your setup.
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Last edited by spdbrake; 01-12-2019 at 07:53 PM..
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  #14 (permalink)  
Old 01-13-2019, 08:29 AM
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Default Impact?

Quote:
Originally Posted by cycleguy55 View Post
Did you try using an impact wrench instead of the ratchet?
I didn't consider the impact ... not sure "I" could control it sufficiently. Might try that as a last resort. Thanks, Ron
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Old 01-13-2019, 08:41 AM
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There's another way of joining exhaust pipes that I used on my Zephyr's exhaust system: V-band clamps

They work really well in confined spaces - even where flanges are too big to fit - and have been on the car for many track sessions and over 13K street miles.

Having said that, I'm not familiar with the exhaust setup on your car, so this may or may not work!

Here's a picture:
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Old 01-13-2019, 01:03 PM
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Default headers

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Originally Posted by Tom Wells View Post
There's another way of joining exhaust pipes that I used on my Zephyr's exhaust system: V-band clamps

They work really well in confined spaces - even where flanges are too big to fit - and have been on the car for many track sessions and over 13K street miles.

Having said that, I'm not familiar with the exhaust setup on your car, so this may or may not work!

Here's a picture:
neat idea ... My headers are four individual tubes that go into four tubes on the side pipes. They're really close together so ....
Thanks, Ron
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