MotorDyne plenum spacers offered at B2autodesigns
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^I'd say go for the copper-it's worth not having to adjust/open/close anything. And what part of PA are you from that it doesn't get that cold....I've lived in PA for a long time and it gets COLD there dude. If you lived in Southern or maybe even Northern Cali, I'd say skip on the copper, but other States, especially North-East, copper is a must. It's not that expensive.
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