hey i have a 93 z28 as of right now all i have is a k&n intake with flowmasters and i punched the cats outs. I ordered a chip from superchips that goes into my memcal box but i have to get it reprogrammed from them. My ? is about how much HP , Torque and what would i run in the quarter if i install the chip, March underdrive pulleys, TPI airfoils, an MSD ignition system, Hooker super competitinon headers and 30lb fuel injectors. all of this with the mods i have now, about what would my spec's be at?

 

The things that will add power are cold air intake, which I assume is the K&N intake you mentioned, the flowmaster muffler, and the memcal chip. Car with these mods shold turn mid to high 13s @ 103 MPH 15-20 HP gain.
Punching out the cat may add about 5HP @ red line, but not much difference on 1/4 mile time.

Things worth getting: long tube headers, cat back system. 20-25 HP

Things that cost money & give little return:
Underdrive pulley. 2-3HP, low voltage problems in traffic
TPI airfoil. about 2HP @ red line, maybe
MSD ignition, no help unless engine is highly modified and needs the extra spark energy
30 lb injectors, no help unless engine is highly modified and needs more fuel than stock injectors can deliver.
Save the money it would cost for these mods and get a set of lower rear end gears, 3.75 (auto) or 4.11(manual) and get a real boost in 1/4 mile ET. With all the good mods the 1/4 mile ET should be in low 13's, and maybe high 12's