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Building Custom Chopper Exhaust Pipe System

Part17 Building Exhaust Pipes
From the February, 2009 issue of Street Chopper
By Ernie Lopez
Photography by Ernie Lopez, James Mendez
Building Custom Chopper Exhaust Pipe System Heat Wrap
I might have the pipes plated... 
   
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Building Custom Chopper Exhaust Pipe System Heat Wrap
I might have the pipes plated to keep them from rusting, but I like the look of the heat wrap.
Building Custom Chopper Exhaust Pipe System All Pieces
After a trip to the swap meet,... 
   
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Building Custom Chopper Exhaust Pipe System All Pieces
After a trip to the swap meet, I had just about all the pieces of pipe I needed for a mere $30.
Building Custom Chopper Exhaust Pipe System Cut Mufflers Off Ends
To get started, I called up... 
   
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Building Custom Chopper Exhaust Pipe System Cut Mufflers Off Ends
To get started, I called up ol' James to bring his welder over. The first thing we did was cut the mufflers off the ends of the pipes and bolt up the flanged ends to the motor to see how they fit.
Building Custom Chopper Exhaust Pipe System Cut Pipe Into 4 Pieces
It was a good starting point.... 
   
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Building Custom Chopper Exhaust Pipe System Cut Pipe Into 4 Pieces
It was a good starting point. The front piece had the right bends but was about 2 inches too long, and the rear piece would not clear the kicker. So it was off to the chop-saw to cut the pipe into four pieces. I used some masking tape to hold the pipes in place 'til I could weld them together.
Building Custom Chopper Exhaust Pipe System Remove Burrs
After cutting the pipe, I... 
   
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Building Custom Chopper Exhaust Pipe System Remove Burrs
After cutting the pipe, I used a file to remove any burrs so that the inserts would fit.
Building Custom Chopper Exhaust Pipe System Inserts
These inserts can be found... 
   
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Building Custom Chopper Exhaust Pipe System Inserts
These inserts can be found at any muffler shop, or Hooker Headers has a pack of 10 you can order from Drag Specialties.
Building Custom Chopper Exhaust Pipe System Pipe Runs Along Frame
Next, I wanted the pipe to... 
   
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Building Custom Chopper Exhaust Pipe System Pipe Runs Along Frame
Next, I wanted the pipe to run along the frame about a quarter-inch above the bottom tube to keep it from dragging on the street during high-speed right turns. I lined up the straight piece of pipe along the frame, then marked where I would weld a small piece of flat stock to hold the pipe in place.
Building Custom Chopper Exhaust Pipe System Temporary Tab
Here you can see how the pipe... 
   
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Building Custom Chopper Exhaust Pipe System Temporary Tab
Here you can see how the pipe will run with the tab in place. When I'm done I will cut this tab off and reweld the mounting tab in its place.
Building Custom Chopper Exhaust Pipe System Join Front And Rear Pipe
I also found a piece of pipe... 
   
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Building Custom Chopper Exhaust Pipe System Join Front And Rear Pipe
I also found a piece of pipe that was the header for a set of two-into-ones. I cut off the two ends and used them for my set of pipes to join the front and rear pipe.
Building Custom Chopper Exhaust Pipe System Tack Weld
Once I had all the header... 
   
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Building Custom Chopper Exhaust Pipe System Tack Weld
Once I had all the header pieces of pipe in place, I tack-welded them together to help keep them from moving and stay lined up with the frame. I kept the tape in place and just spot-welded around the sides.
Building Custom Chopper Exhaust Pipe System Front Header Pipe
Moving on to the front header... 
   
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Building Custom Chopper Exhaust Pipe System Front Header Pipe
Moving on to the front header pipe, I used a piece of heat-tack cloth to protect the motor while welding.
Building Custom Chopper Exhaust Pipe System Cut Angle To Match Frame
I was trying to keep the pipe... 
   
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Building Custom Chopper Exhaust Pipe System Cut Angle To Match Frame
I was trying to keep the pipe flowing along the frame, so I used a piece of pipe with a bend that was close to what I needed. Then all I had to do was cut one side at an angle to match the frame. Once I had that piece lined up, I spot-welded it in place.
Building Custom Chopper Exhaust Pipe System Tailpipe
Next was the tailpipe. As... 
   
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Building Custom Chopper Exhaust Pipe System Tailpipe
Next was the tailpipe. As I mentioned earlier, I'd found two long fishtail pipes that were ceramic-coated, so for now this will work just fine. I will need to get the pipe stripped and chrome-plated later.
Building Custom Chopper Exhaust Pipe System Spot Weld Near Fender
At first I spot-welded the... 
   
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Building Custom Chopper Exhaust Pipe System Spot Weld Near Fender
At first I spot-welded the pipe about a foot past the rear fender, but I did not like the way it looked, so I then cut it back 'til the tip was as long as the fender.
Building Custom Chopper Exhaust Pipe System Pipe In Place
This looked good, would still... 
   
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Building Custom Chopper Exhaust Pipe System Pipe In Place
This looked good, would still clear the frame, and wouldn't burn any passengers (hot chicks) I might happen to pick up off the side of the road or at some shady little bar.
Building Custom Chopper Exhaust Pipe System Pipe Off Bike
With the pipe spot-welded... 
   
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Building Custom Chopper Exhaust Pipe System Pipe Off Bike
With the pipe spot-welded in place, I pulled the pipe off the bike and welded all the seams together. Moving from one end of the pipe to the other helps keep the pipe from distorting and moving out of shape. This will keep the pipe straight and easy to install.
Building Custom Chopper Exhaust Pipe System Weld Finished
I'm not a great welder, and... 
   
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Building Custom Chopper Exhaust Pipe System Weld Finished
I'm not a great welder, and with what I borrowed to get this done, it wasn't bad. I needed to grind and sand all the welds and do a few touch-ups.
Building Custom Chopper Exhaust Pipe System Before Exhaust Wrap
You can see that I will still... 
   
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Building Custom Chopper Exhaust Pipe System Before Exhaust Wrap
You can see that I will still need to send this out to get polished and plated, but I plan to wrap this pipe for now.
Building Custom Chopper Exhaust Pipe System Completed
And here you have it: a set... 
   
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Building Custom Chopper Exhaust Pipe System Completed
And here you have it: a set of pipes that I was able to do for less than $100 and in less than a day's work (and I work slowly). I did call my local chrome shop and ask about plating the pipe. I was told that as long as I did all the clean-up work and all they needed to do was polish and plate, it would run me about $80. I'm still going to wrap the pipe-I don't want it to rust.

Toyota Tundra Research
Toyota Tundra Get all the information you need on the new Toyota Tundra. The Tundra comes with a V8 standard engine and goes for a suggested retail price of $28,405.00. It also has drivers side crash test ratings of 5 stars and passengers side crash test ratings of 5 stars. You also might want to research the Dodge Durango and the GMC Sierra.

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