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John Volk of Couch Builds scanned a European-market BMW E28 518i to aid fabrication of a replacement stainless steel exhaust. He scanned the whole car even though the exhaust work required only the underside, using the project to demonstrate an Einscan Trak 3D scanner.
BMW fabricator John Volk scanned a European-market E28 518i to help design a replacement stainless steel exhaust after the car’s old system rusted out, according to a report by The Drive. Volk scanned the entire car with an Einscan Trak 3D, although the exhaust project required a scan only of the underside.
Volk, who posts fabrication projects on the YouTube channel Couch Builds, used the scan to create a digital reference for the exhaust work. The Drive reports that Volk is known in the custom BMW community for turbo-ready exhaust manifolds and has also built a rotary-powered BMW i8. The video puts scanning to work on a less exotic car: a European-market E28 518i with a 1.8-liter M10 inline-four.
In the video, Volk uses the Trak 3D’s stationary tracking bar and handheld scanning tool to capture the car’s surfaces. The scanner offers adjustable resolution, including local adjustments for more intricate areas. Volk also makes passes with an Einscan Rigil, a smaller handheld scanner, for comparison.
The garage was tight enough to limit movement, and the scan pushed the Trak 3D’s range. Volk’s footage shows him combining multiple captures with the accompanying software. The Drive says the Trak setup requires less precision in how the operator moves it, which can help when space around a vehicle is restricted.
Scanning a Car for Exhaust Fitment
The project shows how 3D scanning can support custom-part fabrication by recording the shape and available space around a vehicle. For an exhaust, a digital model of the underside can help a fabricator plan routing and fitment before cutting and welding material. The report does not give measurements of time saved, cost, or the finished system’s performance.
Volk’s decision to scan the whole BMW was broader than the immediate task required. That makes the video a demonstration of the scanner and its workflow as well as a step toward replacing a rusted component. The example may interest owners and fabricators dealing with older cars, where a damaged original part or limited parts availability can make custom fabrication useful.
The E28 and Its Unusual Engine
The car is a European-market BMW E28 518i. The Drive describes it as using a 1.8-liter version of BMW’s M10 inline-four, which Volk characterizes in the video as producing less than 100 horsepower. According to the report, this engine was not offered in the E28 in the United States.
The exhaust replacement followed the rusting of the car’s old system. The Drive notes that computer-aided design can help with part design and 3D printing with fabrication, while a vehicle scan supplies a digital model of the space a custom part must fit. In this case, Volk used scanning as a reference for making a stainless steel exhaust; the source does not say the exhaust itself was 3D printed.
“sub-100-horsepower”
— John Volk, as quoted in the Couch Builds video and The Drive report
Exhaust Results Still Unreported
The source report describes the scanning process and its purpose but does not confirm whether the replacement exhaust has been completed, how closely it fits, or how the car performs with it installed. It also provides no cost, fabrication schedule, or quantified comparison between the Trak 3D and Rigil scans. The engine’s output is presented through Volk’s description, not a cited test.
The Build’s Fabrication Stage
The next practical milestone is the exhaust fabrication and fitment. The available source does not specify when that work will be shown or whether Couch Builds has published a follow-up. Until a completed-system update appears, the confirmed development is the scan and its intended use as a reference for the replacement exhaust.
Key Questions
Why did John Volk scan the BMW?
He scanned it to help fabricate a replacement stainless steel exhaust after the old system rusted out.
Why scan the whole car if the exhaust is underneath?
The exhaust work required only an underside scan. According to The Drive, Volk scanned the entire E28 to demonstrate the Einscan Trak 3D and test the scanner.
Which scanners appear in the video?
Volk uses an Einscan Trak 3D and makes comparison passes with a smaller Einscan Rigil.
Is the replacement exhaust finished?
The source report does not say. It covers the scan and its intended role in fabrication, but gives no completion date or results from fitting the exhaust.
Source: rss
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