I have a similar engine in my CRX, the D15B Dual Carb. I have fitted a DC Sports DAC on mine and it has turned out pretty well. I have had it dynoed stock and with the DAC, and the performance is the same. I got the DAC cheap so I dont mind coz it looks great but I would be well pissed if I had spent £300 on it for no gain.
It took a fair bit of modification to the stock filter housing to get it to fit,. if you want detialed instructions drop me an email
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