To get 400 WHP, you will
need a turbo kit based on the GT3076R with an intercooler, NGK 8 Iridium spark plugs, 750 cc fuel injectors, a Walbro 255 lph fuel pump, a 3 ″ aftermarket exhaust system, and an AEM EMS ECU.
For this purpose, you will
need a
turbo manifold, an intercooler, a piping
kit, a wastegate, a blowoff valve, a 2.5 ″ exhaust system, a wideband O2 sensor, a boost controller, and a Hondata ECU.