B16A engine is ok for your car, not anything fast; i almost did a B16A swap cuz B18C was soooo expensive, ended up i decided to go BIG and got a B18CR, now i didn't regret after 5 years with few track day with it...it's FUN...
yet anything from B16A to B18C, u are paying a different level for maintenance, gotta give the car much more care than you are running a D16Y8 and if it got stolen then u are screwed...
i used to use Si's header and cat on D16Y7 and use OBX or DC header with Si Cat on Si, feels good; as for custom cat back, do u know the size? 2" is ideal, 2.25" is pretty maxed out already...
try getting a rear camber kit for your car and tune its alignment, that's one of the best mod i like to correct understeer; downside is u have to know the offset of your wheel cuz rear might rub (i think i have used 15x6.5 with 40 offset, it rubbed)...also a 19mm rear sway bar is an ideal mod too, dun go 21 / 22mm as the rear subframe will crack...
ACT clutch ain't that expensive and i think it's worth the price, but Exedy Stage 1 is quite good too and slightly cheaper...
really wanna try those Hypersingle or Supersingle some time, but i still have an Exedy 3 puck sitting in my room  |