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Are you guys using the hard lines specifically for the headers or are you using stock bent lines?

I am just curious because when I added the TTi's to my 340 Challenger, I used my original steel lines on the radiator and at the tranny but I had to cut the middle 16" or so out of each one and use rubber "tranny cooler" lines to reroute without touching the headers or the steering link. I would love to go back to using all steel but the rubber is working just fine.

Mine are hard all the way, they were not specified for headers when purchased if i recall correctly, like i said, some very minor clearance tweaks, fit great!