Nicely done. I had a test pipe made for my '85 300D-T. It was a one-off and made for me by a professional welder/machinist so it was expensive but at the time it was my only option. With a jig you'll be able to make as many as you have customers for.

You might try selling test pipes on an exchange basis. Customer sends in his trap and you immediately ship out a test pipe so that the customer's car isn't down more than a couple of days. Option: charge a deposit, refundable when the customer sends you his trap, after installing the test pipe. Either way, you'll always have a trap from which to cut flanges for the next test pipe.

Pay attention to Sixto's comment. You may be able to get along with a virtual EGR port but some folks may need a real one, depending on the smog inspectors in their state.

Good luck with your new job!

Jeremy

__________________

"Buster" in the '95

Our all-Diesel family
1996 E300D (W210) . .338,000 miles Wife's car
2005 E320 CDI . . 113,000 miles My car
Santa Rosa population 176,762 (2022)
Total. . . . . . . . . . . . 627,762
"Oh lord won't you buy me a Mercedes Benz."
-- Janis Joplin, October 1, 1970