in all seriousness BAC, the vf46 works very well with the racer-x. i too was concerned about lag etc, keep in mind the racer-x tubes are smaller than standard fmic's (<-3in), so this helps with flow in smaller turbos. Secondly, the amount of cutting i needed to do arent noticeable when the core isnt there, i did not need to cut any part of the painted portion of the bumper cover....with it all installed it looks like nothing was cut. really- compared to all the fmics out there, this kit is PERFECT for lgt's and hell, stage 2. I'm running stock fueling and running a bit over 300bhp/tq with this setup. (tbe, fmic, os tune)