Since Greddy and TRL stopped doing their very nice and reliable fuel cut defender I have been wondering about a sensibly priced alternative. The great thing with the Greddy is it did not clamp the MAP sensor voltage until the preset threshold was reached. The HKS one was not so nice and sloped the output from the MAP sensor, skewing the fuel curve. I have now tooled up to produce my own FCD that leaves the MAP sensor output alone until the threshold is reached, just like the Greddy ones, but using more modern, closer tolerance components. It also only needs three connections. One to ground with the supplied and pre soldered on eyelet terminal, and the other two wires go to either side of the MAP signal wire, which you cut near the ECU and splice either side of the cut wire to the 2 FCD wires. They come pre calibrated, with a calibration certificate, and detailed instructions as to how to fit them. I can obviously do them for the MKIV, but can also pre configure them for other engines like MR2 Turbos, RX-7 etcetera.