Originally Posted by Chuck33079

Has anyone ever been dynoed with the bumper off? I've seen countless dynos showing manufacturer claimed whp increases with the bumper on. I've been to plenty of dyno days and not once has the bumper come off - and people were still making more power than stock.

Is it just me, or does this smell like inventing a problem in order to sell a solution? This company only makes shift knobs for the Z34, and suddenly they're an authority on how to make power? Hell, they didn't even include a link to this article they claim justifies the need for this product.