i used to use the S-AFC with Vtec. its a piggyback fuel controller. it also includes the pressure gauge for the turbo. tach meter. and 6 other details you can see thru the blue screen. can be configured to record your run (rev,fuel, presure etc) you can tune your fuel map to gain performance or to economize your fuel.
Apexi Rev-Meter. that has the 1/4mile time, speed, 1/8 mile time, 0-60foot times etc. its more on knowing your times for tuning or racing performance. works with the S-afc to know if you tuned your engine right.
the last one is the Apexi product that adjust the timing of the engine. i forgot the model name.this one is good for turbo engines as you can advance or retard timing specially when boost comes.
those products were used on my old civic 96 Vti.
apexi also have turbo kits, intakes, exhaust, springs, etc.