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Originally Posted by Kevin
the duct collapsing is not an urban myth. I'll testify to that as can Keith. pop the hood on your car in the sun, let it sit for an hour then come back and squeeze it. I'd be willing to bet that you will be able to almost collapse it. I can remember watching the duct get sucked closed on keith's car on the dyno in BG several years ago. The stock duct sucks. I went though 4 before I got smart and bought the coplin duct.
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i can squeeze the stock duct cold if i want, not a big deal, i'm not saying they are all perfect but i don't believe they are ALL junk either. i'm not one to wave the General's banner, believe me. depends. it's all about draw. where's it drawing from (air cleaner inlet) & how much is the draw (stock LT-5 or modified) . a person can put their hand over the end of a vacuum cleaner & watch the hose snake up on the floor. i'm trying to help DScott600 by keeping his eyes open before he goes & spends his money with both fist's. check it out first, doesn't cost anything
. how many cars did we chassis dyno at the PNW gathering a few weeks ago, eleven i believe. inside a building (warm) i didn't see any duct's get yanked off because of the infamous collapsing. again, not saying it's never happened. i see guys overbuild stuff that just doesn't matter all the time. i try to focus my attention (time,effort,money,etc.) on things i KNOW help.