I have a 2003.0 AT sedan and recently put in the following mods:

-JWT Popcharger w/ Z-tube
-Coupe Midpipe
-HR Y-pipe
-MD 5/16th iso thermal plenum spacer

Now with that said, am I waisting my time sinse I CANNOT do the Osirus tune? I really do love my car and think its great as is, but should I not bother doing anything else? Any input would be highly appreciated! Thanks

 

Depends on how far you want to go. You could also switch to 3.5 gears, high flow cats and a true dual system. But none of those mods will hold you back w/o a tune.

If you want to go FI or SC, tuning becomes a BIG problem. You have to do standalone like a Haltech but there is a harness plug and play now I believe.

 

I am pretty sure ToolboothWillie posted a feeler threat about Haltechs for the first gen sedans. He's a really great member so would probably be able to sort you out OP in terms of what is needed for the Haltech.

OGG

 

Definitely depends on your goals. Even if you could tune, it won't get you crazy hp, only boost can do that. You can do lots more with looks and handling, too.

 

I got the same ride, 3.5 gears big help, Full traction but i do regret going with the 3.5 wish i would a gone with 3.7 now. Also cheaper mod that helps a bit would be the grounding kit. Help your car shift better

 

Get Test Pipes or HFCats, throw on a true dual catback exhaust and a TransGo shift kit. Best mods in terms of bang for the buck in the performance department. Then start on suspension. Coilovers, camber kits, strut bars, sway bars; etc. Lighter wheels and performance summer tires.

 

This. unless you don't want much from the car, N/A builds are a waste of money.

Engine swap or Boost if you want a lot more power from this engine.