Engine Performance Upgrades   Feb. 2006 Note: About the only thing harder to find these days than 323 GTX parts to keep in stock is 323 GTX customers to buy them. As a result of this problem, we are sad to say we will be discontinuing our normal stock of 323 GTX parts. We will continue to maintain these vintage pages as a service and for general interest. There is a lot of good information burried in them. All 323 GTX specific parts that we have in stock will be listed on our Garage Sale page until they are sold out. Once again we apologize. We will still attempt to provide some limited tech support. The new kids on the phone here have scarcely seen a GTX in the last few years though :-P     Engine Performance Upgrades    Exhaust HKS exhaust system Intake K&N Filtercharger K&N Filter Care kit (cleaner & oil) Electronic Control GReddy PRofec B electronic boost control Spark! NGK plug wire set NGK spark plug: 1 step colder spec (each) Bigger Turbos IHI VJ-14  upgrade to VJ-16 specs Core refund for VJ-14 turbo Exhaust manifold kit