TFS: How to Build a Pie Cut Chopper Exhaust 

That settles it! Now I will be pie cutting two headers for a V8 and one set for a motorcycle. Phenomenal video. Many thanks.

So glad I watched this episode, thankyou.

Bob Ross style: We have a happy little bend here no mistakes, just happy bikes? Dig that shout out

Wow .. thanks for the video. I TIG welded all the railing on my sailboat. Now I'm building a chopper and will need a custom exhaust. Yours is the first video I've watch on exhaust welding. ... Don't really need to see more :-)

Wow, you have some amazing skills! I just started welding and read and watch as much as I can to glean as much wisdom as possible. Your channel is great, you show everything in great detail start to finish with excellent voice over commentary. Keep up the solid videos man!

I'm thinking about doing this for 79 cb650... Lots of pie cuts!

That was awesome! The part where you showes your tacks popping loose was great. Showing that those type of thing's happen to everyone is very important! It makes you video's even better. Instead of acting like you are always perfect

Sweet jebuz... that’s gonna be a fk tone of welding and blending! I get those pieces for intermittent use but why not use 180s for at least the majority?

You are doing a good job!

Nice one Justin!

Did you run that much tungsten out to help give more color? And I've noticed on your videos that when you are welding around pipe (especially small diameter) that your torch angle gets really severe at the end. Like almost 90 degrees. Are there any videos where you show how the weld changes because of this? I've seen instructional overrides that you should keep the torch angle as consistent as possible. Thanks.

Skilled work I’d sign the check....$$$$$$$

chopper or motorcycle, well said👍

Dam it make me wana do my custom exhaust on victory v92sc..

I want to hear how that bike sounds! 😉

Could you make some for a shadow I’ll pay for them

Awesome videos I could use some advice i have a custom chopper with a s&s shovelhead and I want to custom fit vance and hines shortshots that are setup for an evo. I bought them used what's the best way to convert those to a shovelhead setup ? I was going to buy some shovelhead flanges and weld those up in place of the evo flanges and fill in the groove from the evo any advice would be great

I know this is a an old video and probably won't get a reply but hey what size wire did you use ? Was it 1mm or 1.6mm?

Dude, that's fucking mint

Out of curiosity, style aside is there any other advantage in doing pie cuts vs using sections of 90 degree mandrel bends? there would be a lot less welds and I would imagine that the inside of the bends would be smoother and (a little) better for exhaust flow. that said...man, those pie cut exhausts look so sexy! really enjoy watching your videos.

Awesome build! Here's my doubt: I was always told that exhausts should be equal length. Here, I see different lengths. What are your thoughts on this? Thumbs up from Biker's Garage 101

What centerline radius are the pie cuts?

Just get a pipebender and do the pipes in two hours....

What's your argon flow rate with that much tungsten stick-out?

I was really wondering what type of tube bender you used in those videos way back. The black one would love to know the name of it

What cup are you using on your torch

what welding helmet you using there justin? lincoln 3350?

Why the stick out???

hang on just a damn second, lets go all the way 2 the end here, why diden't you show the grinding up and polishing them or do you just leave it like that?? what about some of us who might want 2 make them out of regular steel and chrome them? lets go all the way to the end and dont cut the video short??

Nice paid advert lol

Not a welder but couldn't you bend the pipe instead ? They also make them pipes LAF they are called for 80 bucks

I’m a shop owner and I really appreciate guys who unselfishly teach in small displays like this I’m getting into more fabrication and really need these vids thank’s 💪🏽

Now im only a hobbiest but pie cutting is one of the least difficult, and frankly least time consuming parts of the build process, I can't see the point of purchasing these unless you're a mad busy fabricator with no helpers. Just for reference a 90° bend of that 1 ¾ is 26$, then add shipping.

Got that tungsten hanging way out there

Man, every time I come out of the engineering side of things and look at the craft side, it never ceases to amaze me.

This was great! - I used to work in a locomotive rebuilding facility - I welded the cabs back on the frames after the rebuild - I had an .045 mig bead half inch wide to put down 115 feet long for the close to 55 feet long cabs,,,, Great video (y)

Bro, at least start the bike. What a buzz kill.

Just wanna say thank you for making this series. Incredible information you guys, or guy, are passing on. keep goin for the rest of us making it up as we go, thanks again.

bet you got some pretty good weld burn, with that short sleeve shirt, huh? .... good brain prep for the jump, watching vids. i tack on the bike with MIG, and weld oxy-fuel. ( it's the Non-Pie way to go, for those of you who can't afford a Decent TIG ), and you can use CO^2 for the purge, but you have to let it cool down, and watch your distortion, ( and sometimes you grind out tacks and re tweak. ) another tip, is getting a disk sander from harbor freight ... so you can tweak in any cuts, when your cut is a little off.

thats nice work bro well done......please try staff of hermes,the medical symbol with dagger between two snakes and engine heads will look like wings or add something,

Love the commentary during the design and build process. Great video.

Do they need any support bracket on or anything like it to stop vibration or movement?

Have you ran into any issues welding right next to the silicone purge plugs, any issues with melting?

I've watched this video probably a dozen times over the years since it came out, and this winter, i feel im finally ready to tackle this... on my wifes bike. Not mine of course, because *that's* getting titanium and i wanna get my eye in with the cheaper material first 🤣😂

It's an titanium exhaust? That's expansive and much difficult to weld than inox

that looks cool af ! if i was living in the states i'd def come down to learn from you at your classes

Mmmmmmmmm pie. Fu@k, it’s 12.30 and now I’m hungry.

Are they tight/loose radius 4.5 or 7.5???

great job! thanks for sharing that was a lot of argon!, greetings from Guatemala

really nice pie work there, ( that's where all the purge gas goes )...just mentioning a different approach in my next comment. ( mandrel bends and pipe wrap ) and if you have a disk sander, you can use a Sharpie to just mark it on the bike ... pull it off each time to weld, and you can do it with Just Three Bottles, and No MIG. ( as mentioned below ) just saying, if you can't afford a Decent TIG stay home ... but if you can afford a good one, you will be fine

Good afternoon, what is the thickness of the tube? Thank you

😂😂😂😂 1.7k for downpipes😂😂😂😂😂 are you freaking ok dude?

Another great exhaust tips video, thanks!

I'm a plumber and listening to you talk about just winging it with the angles was hilarious. You would be able to show up and run drain lines no problem haha. It's the same thing! We are all just grabbing 45's 22's and just winging it 😂

These pipes are only attached to the cylinders, there's no other mounting point. Doesn't that put too much stress on the exhaust port?

Fuck yeah, great video, I like that he shows how much the project costs, helps me out as a fabricator how to estimate jobs

How did those welds come out on the inside with the argon filled tube? Do they look about the same as outside? I think the only time I ever set anything up for gas coverage on the backside was for certification tests. Kind of reminds me of times I would make a curve in a tube by cutting a lot of slices in it and rewelding I want to make some new pipes for my bike. Where do you get these pies. Do they make plain steel?

so many points for the Bob Ross reference !!:)

Only $1800 for that exhaust? In Australia you wouldn't even walk in the door of a shop for under 3k. Bit do you get sick of welding those pie cuts? Or are you like me with the MIG and love laying a long bead and trying to outdo yourself on the next weld?

Anyone know if you can use a mig instead of tig to make exhausts? I'm sure the finish isn't as clean but can it be done?

Your a genius. I have a miller 190 and just bought a AC DC for aluminum but also others, and I'm binge watching all your videos. Thanks!

lol, and another unnecessarily loud motorcycle is born...

Question about pie cuts. The 4.5 degree cuts must leave the ends of the pies oval. How is it that you can rotate these as you please and they all match up perfectly? Is it just within tolerance at these angles?

Most of these type of fabrication videos have annoying presenters, but this guy is actually enjoyable to listen to and explains everything real good. Subscribed🙌👍

Why such a long stick out on the tungsten, surely that entails a gales worth of argon.

Great piece of information.. For those who’re planning to build one make sure there’s no fuel and stay clear off the air cleaner while tack welding because there’s always some fuel fumes left in the air filter and you don’t want your bike / shop on fire..

Hi! Thank you for your vids! Any idea how to make stainless steel fishtail for Motorcycle exhaust ?

Are all these pies cut the same?

Great video and awesome job but I personally would stay consistent and made this horizontal straight segment of the front pipe out of 1-piece :) anyway, thanks for your videos, learned ALOT great fabbing techniques from You over past few years! Oh, and thanks for metric conversions too, greetings from Poland ;) I already got used to some imperial stuff, however some other still bit confusing if you need to listen and think fast :) and still had to convert 15 cfh to ~7 litres per min (l/m) and 180 cf to 5-6 ? cubic metres (m3) ;) again, thanks for your work

Is open pipe? Is good for engine? Thanks

Honestly.. it looks a bit messy.. but ofcourse that's just my opinion..

Great job.......... i gotta say, you said pie way to much for me........ but yeah great job

Me parece que es una belleza.

A good channel. I wish you success. Greetings from Murmansk.

Awesome video! Might just use pie cuts on my intercooler piping setup

Thanks for giving the sizes in mm very helpful!

How come you didn't bevel the pies? I know that would be a lot of work, but they seem fairly thick to butt up and use filler on. Seems you would get very high bead profile. Just asking..

thank's for the metric conversion !!

How much money for all those pies??

The only thing I do not like it close to the drivers leg .

"Do it Bob Ross style"

Ø du collecteur?

Such a dissapointment that straight section is 2 pieces why didnt you break the tack and recut it the correct length?

Hi would u not walk The cup while welding?

Sick

Can you use a pipe bender for uniformity.

great that you share your pricing methods too.

When your tacking it looks like you just prop the cup? Do you run a foot pedal or switch? Nice work thanks

Was it about the same cost useing the pie cut kit with saving time, compared to cutting them your self.

Nice work, but mandrel bends would have been much easier, a lot less welding!

Very , very nice work ! I understood every other word but still very very nice . I'm here to learn .

Is the material you use stainless steel?

$1330. to $1720.?? Not now , not ever. Bend kits preferable for that reason alone. Thanks for the video.

19 people know how to purge

Thats a hell of a stick out wow.

Quick question, say someone was welding stainless steel tubing for a motorcycle, and they didn't notice their back purge hose fell out. Could this person purge and re-weld, or would this require cutting out the bad weld and redoing it. I've got sugaring for about 3/8 the diameter of the tubing.

Crazy question last i was told pipes with no baffles will disstroy your piston rings due to no pressure and youd have to run your jets in the carb really big

Love the bikes paintjob

Absolutely killer! Great video, subbed.

Great work - Thanks Justin for sharing