Nissan Side Feed Injectors:-

23 cc = 16 WHP
46 cc = 31 WHP
93 cc = 63 WHP
139 cc = 94 WHP
185 cc = 125 WHP - Pink GA16
231 cc = 156 WHP
259 cc = 175 WHP - Red SR20DE
278 cc = 187 WHP
324 cc = 218 WHP
330 cc = 226 WHP - Grey SR20VE
370 cc = 250 WHP - Purple SR20DET
416 cc = 281 WHP
444 cc = 299 WHP - Brick Brown SR20DET ( S15 )
462 cc = 312 WHP
509 cc = 342 WHP
555 cc = 373 WHP - Yellow
601 cc = 405 WHP - Yellow Tomei
647 cc = 436 WHP
692 cc = 468 WHP
740 cc = 500 WHP - Red


Nissan Top Feed Injectors:-

350cc = 275 WHP - Green SR20VE 20V P12
444cc = 299 WHP - Yellow RNN14 GTIR
444cc = 299 WHP - Yellow SR20VE-T

The WHP figures are a guideline only. This can depend on the application