What size is the 2subs in rear wall on 2005 crossfire....? And can I put a chip on to help power? Ty. New owner of great crossfire ..love it.

 

Don't know about the subs, but DO NOT WASTE MONEY ON A CHIP !!!!

EuroCharged is the way to go, they just had a special for $300, but I think it ended....

Eurocharged Performance and Tuning- Exotic and European Tuning Specialists

If you have a N/A ( not the SRT6 ), then you will need :
1. a single or dual CAI ( NeedsWings or home built - see any post by maxcichon for pictures of a sweet home built )
2. a 74mm throttle body
3. the EuroCharged tune

the above will take you to around 240 - 250 HP

If you have deep pockets, check out the turbo thread .......

 

The subs are just 6" speakers with low pass filters on them. Hence the lack of volume from the rears. Check out the capacitor mod to tweak that.

 

Try a sprint booster, great addition. Did mine recently and the difference is very very very noticeable more so on the RED setting. No HP increase but much improved off the line time.

 

You got good advice on the Eurocharge tune. That's the way to go. As for chips, I would only consider chocolate...

 

or poker, you gotta pay for the tune somehow ....