I guess everyone saw strange shape of 3.6 intake. Here is very detailed explanation why replacing it with usual pipe makes negative effect.
In fact, my personal tuning process with xtremeracingtuning.com confirmed that there is zero positive effect in running takeda intakes or similar. The only thing you can do on intake is to open lower port and make sure that inlet is in high pressure area (facing forward).
Complex shape of the stock unit should've provided pretty good guess to all curios people. Making usual pipe is way cheaper, and sound difference between the pipe and stock multi-chamber intake negligible, so chambers are not about noise supression.