Thread: Noob Here: 03 GTP parts on a 04 GT?

Some parts will work but not the major parts like: Supercharger (youd need the lim off the donor car + its a smaller blower overall so less power)

04 has the drive by wire standard ( I believe)

I also believe they did away with the L67 in 03 too so the engine is overall a little different.

Sense the car is so cheap I'd try to fix it up and flip it with the low miles and all.

Lastly, they head gaskets are rarely a problem on these cars so double check that its not a bad LIM gasket or anything like that, see if its had any recalls done too... Basically check the whole car over before taking it on, if these cars have been neglected they can be a hassle to get back to normal.

Good luck!

Yes, certain parts would fit but it would require alot of work.

The cylinder heads, intake manifold, balancer, idler bracket and such would have to be swapped if you wanted to supercharge it. I think you'd need a L32 fuel rail because the L67 rail is for a return style system, you have returnless. The throttle body would need an adapter for the GEN 3 supercharger I believe. Aftermarket headers should be a must because the L26 in your car is a high compression motor compared to the L67/L32 cars and you need to have better flowing exhaust.

Then after a bunch of other changes and various things to buy you need to still somehow tune the car for the changes. The computer and motor were never suppose to be supercharged from the factory so it needs a tune to run correctly and not blow up.


And honestly because you are new to cars and working on them, I'd suggest you not do a mod with these challenges right away.

I'd buy the car and fix it and flip it. Blown head gaskets isn't very common on a 3800, the lower intake manifold fails first and sends coolant into the oil and or coolant into the intake and it burns it out the tail pipe.