There's a lot of stuff from Japan that seems to have little correlation between cost and value.
Not sure what the kit contains, as I've forgotten most of my Japanese, but I don't see an adapter plate in any of the pics. If you are intent on squeezing out every last drop of HP then, by all means, go for it. I'm not a naysayer; I'm a realist. If you agree that priorities should be set based on cost/value, then there are lower-hanging fruits to pick. If money was no object, the car would already have I/H/E/FI/weight reduction/suspension, and you could write a blank check to have someone figure out all the little issues that will come up (I mentioned the obvious ones). If $800-1200 headers give 20HP, then expect to pay over $40-60/HP, since headers are among the cheapest mods. There are no secrets...the guys who designed the C30A don't look at a 90mm TB and slap their foreheads in regret they didn't think of using that instead. I would love to see dyno results for this mod (and only this mod--not combined with other things). But I'm not willing to pay for it, and I don't relish the thought of being a guinea pig for working out bugs. (Despite the fact I have 2 Q45 TBs in my garage, and engines to match).Fuel delivery shouldn't be a problem if the system's healthy. I would bet $20 the engine is over 90% efficient at WOT...an extra few% of air should be covered by the stock capacity and map. Even the CTSC @ ~340whp only bumps the fuel pressure on stock injectors.
Ton, I don't mean to discourage you, as you will satisfy your-and our--curiosity no matter what. The part is paid for and hopefully it won't cost much more than some leisure time. I am glad someone is willing to try it and I sincerely hope you're happy with the results. If you ever need any references for the Q let me know--I'm extremely familiar with it.
