Prepare to get flamed man, this topic is almost certainly not thread-worthy. Anyways just stick to the basics untill you are ready to build a motor. Intake, header, exhaust, underdrive crank pulley, light weight flywheel, one-piece driveshaft, and of course a really good tune-up (no bosch plugs or cheapie cap&rotor/wires). Once you get your bolt-ons handled I would go with a jim wolf tech ECU and swap the intake manifold (not the plentum) for an s-14 KA one as they do not have the dumb ass butterflies. Another budget upgrade would be using an exhaust cam from an s-13 kade as your intake cam (it has more aggressive lobes). Bottom line is that there is a ton of upgrades, you really need to SEARCH! And not just on zilvia either.
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