sorry Mike, but that's a pretty porr statement to make that if it requires tuning than it isn't great?? Most if not all larger upgrades will require tuning to extract the greatest gains. The velocity stacks are awesome. the issue is that the rear cylinders will be absorbing the hotter temps due to the placement of the stacks and that they're open. Same issue on the e46 chassis. They sound sick and I'm sure build big power while moving but for around town they suffer from heatsoak again due to the design. The nice part about our intake is that our stacks are composite which does not retain heat and is located inside the intake plenum, which coupled with the sealed intake box keeps temps down thereby building power.
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