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With the supercharger kit installed some very large orifice injectors. Both at the top and bottom of the injectors there are black rubber cups rather than o-rings. I am looking for a part number and place to get replacement cups (seals). Can anybody point me in the right direction? Much appreciated.
 

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Your looking for the stock injector O-rings? You can order them from any Toyota dealership (2003 Celica GT-S).Or are you saying you need custome ones? I have RC550's and they use the stock injector o-rings.
 

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Those I believe are the "isolators" like a thick washer made of rubber.Those do not usually leak as they are not under pressure. They go on the injector closest to the head. The O rings go into the fuel rail and stock size works best. If you have a leak it is most likely a leaking O ring or mis-alligned fuel rail. Make sure the tapperd seats are fitted correctly for the 2 bolts that hold the fuel rail. Tommy
 
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