How much can be added to a 1.6 VTEC Honda Civic besides exhaust and intake?

 

A lot. Performance plugs, filter, wires, clutch, flywheel, pulleys, cam, pistons, turbo/supercharger, injectors, head port & polish....just to name a few.

 

hmmm..... where to start.
the possibilities are endless. you can do the little bolt-on stuff, intake, header, exhaust, adjustable cam gear, underdrive pulleys, fuel rail, injectors, high flow catalytic convertor, intake manifold, throttle body. then if you want to go further, you can go with a built head and/or bottom end. cam, lightweight valves, 3or 5 angle valve job, port and polish, milled head (raises compression) new forged pistons and rods with a micropolished, lightened, balanced, and knife-edged crankshaft. you can go foced induction, supercharger, turbo, nitrous. either before or after the built motor. then there is the suspension and brakes, im not even going to get into that, unless you are interested. im sure i didnt even touch on some stuff, but those are some places to start. decide what you want the car for then plan from there.

 

Are you serious, or is this a joke thread? You have a civic... a.k.a "one of the easiest cars to mod". everyone makes parts for your car... everyone. The possibilities are endless

 

Pretty much hit the nail on the head...