Yes Honda but that motor is not from the GTR ,it's from the 924 GTP LM witch race at LeMan. When first put in the car it was boosted to 600 hp then detuned to 450 hp for reliability, I believe there is only 3 of those motors left worldwide one is in the Porsche museum car -one in a complete car somewhere in Australia & believe the same guy owns the third motor if I'm not mistaken. The LM motor has LeMan script on one of it's bank.
This pic is also from a GTP but not the LeMan car.Not sure but this one should have approx 350 hp. There is also another version of those motor this one look like an 944s2 motor I believe Shumi has pics of that one.
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83-944 show room -sold___New ride 93-968 with SC steering wheel-ROW signal ligths- Susp M030 mods lowered,Porsche VA springs- Adjustable struts - Bilstein inserts - Bilstein sport rear -LSD -riding on Cup 1 wheels 17x8 frt 17x9.5 rear road contact Falken 452/ 225-45 ZR Front 255-40 ZR Rear -- Motor Mods /chip /K&N / mod air boxe just love the handling & power