So has anyone personally used any of these pre-formed jobbies? Do you folks think I can just glob some weld in between the pipes? Also, when final welding is there a particular end I should start from or anything? Pre heat? Like I said I'm a noob at this. Thanks!

I`ve ordered many times from columbia river mandrel bending - they are awesome

looks decent

Looks nice, how did you figure what cylinders to pair up on the first set of Y's

Mainly copied other commercially available headers but the firing order is 1-3-4-2

You could do a weld over the places that have gaps and will leak air, as long as it is a good weld and covers it up you should have no problems.

From what I have seen...

You weld the tubes together on the ends and then slip the coupler over the tubing and weld it onto the outsides of the tubing.

Something like this: Picture

Good job. I like it.

hammer

I spent quite awhile mulling over the collector welding issue. I tried adding filler in the crack but it was a big ugly mess.


Attachment 8162



I ended up just welding the ends of the pipe up and adding material to fill the gaps then sliding the collector on and welding it up as suggested above. It seemed to work. I'm going to take it to work and smoke test it for leaks later this week.


Attachment 8163



Some welds turned out better than others. It's got some obvious issues but I learned a lot and hopefully it will hold up OK.


Attachment 8164


Fillet welds are easy to make look good. But are they strong?

Attachment 8165


The collectors were where I had the biggest issues. I was never able to get a nice tight gapless joint "" all the way around. As a result I had consistency and undercut issues.

Attachment 8166

Attachment 8167


This one turned out like absolute garbage. I think I got it too hot or something? Sadly it will be one of the most visible welds once it's in the car.


Attachment 8168


Anyhoo here's the finished product


Attachment 8169


Attachment 8170


Attachment 8171


Installed

Attachment 8172


Tucks up there nice and tight with plenty of ground clearance.

Attachment 8173

So I can get low.

Attachment 8174

Welding experts please give me some feedback.