Only the TII Is turbocharged, as black rocket mentioned, most 240's in the states come with the ka24de, my friend has a 240, and is dropping an sr20det, in it, and those come/came stock in the s13's in japan. Anyways im gettting kind of off topic. Which year was your 240? is it s13 or 14? And if your keeping it, drop an SR in it

Oh, and all 2nd gen rx-7s have the 13b, the 12a was in the 1st generation, but is it true some have 13b's? Or am i completely off my rocker.