well top quality would be mugen of course, but are they worth paying 3 or 4 times the price? Maybe if you are going all motor and you need every little bit that you can get from anywhere possible. In response to Drift, why is a 14.2 so hard to believe for what he has? I have seen h23vtec setups which were tuned like he says his is, running 14.2 all day and they were claiming they have hit even better times..........also, Ive seen base model ludes which had most of the bolt ons and v-afc dyno tuned hit 14.6's.... good job drift.......