I'm currently in the process of upgrading my top hydraulics, but apart from that my '05 Crossfire Roadster has no modifications on it. I've got a bit of money to spare, and I was wondering what are some must-have mods that would be a good investment? I'm looking to increase the horsepower, as well as performance.

Chips/tuning? Exhaust? Should I remove by back cats?

 

NW CAI, 65mm pulley, tune

 

65mm pulley applies to SRT6, OP didn't state the model ......

 

There is a 'good' investment on a Crossfire?

 

Its regular, not a SRT6.

 

I have most of the parts necessary to turn it into an SRT. PM me if interested or call me @ 210 648 5779.

 

For the N/A, about all you can do performance-wise is :
1. CAI
2. 74mm throttle body
3. EC tune
4. SS brake lines
5. bigger brakes ( SRT6 or SLK32 AMG )
6. wider tires
7. a Sprint Booster ( makes you THINK you have extra power )
8. the new GC ( Ground Control ) handling kit.

The jury remains out on Corkie's turbo upgrade.
The exhaust ( cat-back ) upgrades will give you a meaner sound, but little if any performance improvement.