Tell you what the car can handle with re enforcments but the engine UM NO! Go get you a 3SGTE conversion and then ya you will be able to handle it! The GT-S is slack I ran one with my 4th gen with a mesley 3SFE (115 stock) with a K&N filter and straight exhaust. I whipped it by at least 5 cars and I didnt get thru 3rd gear. You know he had over 200hp and the car comes with 180 stock so you know he had a AEM cold air intake, cat back exhaust, plugs and wires, MSD ignition, and ECU Upgrade. So from my experiences I would rather have a older model celica. But I know they are making a supercharger for it on stock boost im sure it will add around 80-90 HP but who knows that engine in it "MIGHT" get 600hp but doubtful its alot of money to get a 3SGTE to 600hp but its done and they have seen 800hp numbers but once u get that much you might wanna like I said re enforce the front end or One your not going to have Traction and you prolly will twist the frame
