Well i got good news:
WOOHOO!!!!!
Took me a week to play, but i finally did it.
I finished the game!!!! 
Well i can't remember the playing time, but i think i finished the game around 6+ hours of gameplay 👍 Defeat Ryu Watanabe after a long battle with him. (hard...pff, it was no sweat, however i did have a hard time at the drift duel, like how the 🤬 did he drift that 🤬 evo?

) But still, i'm very happy that i have become the street king. Only done 96% so far, need to finish 100% of the game tomorrow. So this would make me the first to finish the game in GTP isn't it?
im gona by it. I really like the physic's with the G25, if oly it had 900 deg mode...oh well. I like how the car's have a definite weight to them. Oh and im so glad they got honda back, esp the oldschool civ(if it can be called that lol) i just wish it was right hand drive, or we could pic the side when we by it. How do you get 1000hp outa the wrx??? ive got stage 4 engine and everything else stage 3 and it's like 980hp in the tune section(put the boost as low as it goes for end boost and you get WAY better dyno results) and 950hp at the track...
Damn....i can't answer that as well. Don't know what i did with the setup of the car, but i think i did only got like 980HP with all the stage 3 parts max. Then i got the stage 4 tranny and the stage 4 turbo and tweak the boost and well thats how i got my car that powerful. I tried to max both the low and high boost and got 1086HP!!!!

Its almost the fastest car in drag racing!!! Well since i finished the game and had lots of cash, i did some research on some of the cars, but wierd thing is, nothing came close to the Subby. The Zonda F only manage 1016HP while the Evo IX manage almost the same (in fact, close to my current Subby HP, around 1046HP) the Skyline were both had sad results. The R34 could only manage 960Hp while the R35 manages a disgraceful 700HP.

Oh yeah, a Ford GT has 1000+HP as well, but it was on a speed setup. The amazing thing is it has over 1G of grip!!!! The Lambo manages 900+HP, but i don't have high expectation for that car.....
But i will try to research this some more when i have time. Also i remind you that i didn't do all of these cars on drag setup and i didn't get a stage 4 parts for the cars neither. But all are done with max low and high boost. Another interesting thing is that each car may have different setups depending on what type of race the car is racing. A drift car would most likely have less HP than a drag car, but then again i don't really know why....(because i try to tune a S15 Silvia for drift and it only produces 350+HP with max boost, but when i see an AI racing on a speed challenge, their S15 has over 500HP!!!)
Well hopefully you manage to get that Subby to go over 1000Hp and kill those other cars on the drag strip. 👍