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Turbo ECU (jspec ecu will work)
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*only for 87-88 turbo* knock control box, a small silver box up inside the passenger kick panel that plugs into the wiring harness. On 89 and later setups, the ecu handled this function.
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turbo boost sensor.
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Turbo throttle cable. 87-91 are interchangeable.
•• turbo brake boost vacuum pipe (or you can simply run a longer rubber hose to your existing pipe)
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Stock turbo fuel pump (87-91 turbo pumps are the same, but the bracket is not) or upgrade such as walbro 255. A rewire for full voltage from the fusebox is also recommended, as well as a re-ground in the hatch to bare metal, a new pickup screen and fuel filter.
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Stock turbo intake duct with blow off valve (if not present on engine already). The 87-88 TID is smaller than the 89-91, but either can be used in place of the other. Blow off valves are slightly changed but basically the same.
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Stock t2 precat/downpipe and midpipe (bolts to main cat) or aftermarket/custom equivalent.
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T2 hood with scoop (unless you go front mount intercooler from day 1)
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Turbo air flow meter (your old nonturbo afm will get you by if you cannot find one, however the turbo afm is calibrated for slightly higher air flow on top end so it is something that might matter once you begin to push the car).
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Aftermarket boost gauge is recommended. Even though 89-91 owners can install the 89-91 turbo gauge cluster and the gauge will work, it is still not very helpful. 87-88 owners cannot install the stock turbo gauge cluster and expect it to work, the wiring harness differs in this area, though if you were really worried about making it work you could run your own wire to accomplish it.
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Aftermarket upgraded clutch and pressureplate. Remember, you're buying this for a nonturbo, not a turbo, since you're using your old NA drivetrain still

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