I have an auto 04 coupe

Current mods:
M2 exhaust
Grounding kit
Pelenium spacer
Ztube

Only mods left (for engine drivetrain)
Shift kit
3.5 or 3.7 rear diff


Should I get the tune now or will I need to re tune after these parts are put on?

 

I'd say now because your future mods don't have anything to do with your engine.

 

A diff swap won't have any affect on a tune.
Not sure if any tables would have to be modified in Uprev for the shift kit, I don't think it would matter but I'm not a tuner.

 

If ur not going to get anymore breather mods like HFCs or test pipes your good to go with a tune.
But hfcs/tps really open up the exhaust nicely.

 

But I wont pass smog

 

you'll pass with hfc's

 

In cali....?

 

HFC's arent even street legal in Cali anymore. So you would most likely fail smog unless you "Know a guy" haha

 

Santa Ana ftw

 

There's plenty of us from cali that run HFCs and pass smog.
TPs are the PITA to pass with.
Haven't had my smog check yet but after talking to a bunch of guys locally they had no probs passing with HFCs.
HFCs aren't legal in cali, but what is anymore.
If it doesn't show up in the #s on the computer the tech ain't gonna care.

 

What kinda of power gains will I see with hfc. Not that cheap considering test pipes are 75$you used

 

Hahahaha.

Youre ready for the tune.

 

Thank you! Been driving me crazy

 

Spelling ****!

 

Get it now. It's not like you can't get it retuned down the road when you add to your mod list. There's other features to it though that you could be taking advantage of right now...such as the rev limiter removal etc.