Without the right tools, coping tubing can be confusing to layout by hand especially when offsets are involved. I came across this calculator in a dark corner of the internet. I printed out a few of these and they're pretty accurate. You're welcome.
Cope tubing manually.
Thanks, I'm putting a exhaust dump on a GT500 and this worked OK. I haven't figured that part out yet. If you print using the PNG output, it's not bad. I just split the template in half and it was really close. If I had split it in quarters it would have been even better. Just a little trimming with a grinder and it was good to go. The above calculator is way easier than the trial and error method I have used in the past.
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