Check the link I posted to FIRST's site. The runners are individual tubes on the inside, but solid on the outside. I believe they're designed that way so if you wanna port them more, you have room without having to redo the outside.
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Seeya,
Steve R. in North Jersey
'16 Go-Mango Dodge Charger R/T. It's so good to be back in a V8-powered, RWD car!
Former Toy - '88 Monte SS - had lots of mods...
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