[Nick7550]

Just picked up a Black 2007 Cts-v with 48k miles bone stock for $18,000!

Due to California's thousands of rules and laws I'm limited on what i can do to my vehicle, also it is a DD.
basically what i am posting here for is opinions on what my plans are and or things you recommend
in the next week i was gonna get

- a cold air intake ($105) from pro tuning.. it seemed similar to all the others but at a fraction of the price
- custom 2.5" catback exhaust w/ X pipe and idk what muffler yet maybe a corsa
- possible tune

Exterior
H&R lowering springs W/ 5mm spacers in the rear ( hoping to lower without rubbing much)

just want some opinions on the set up

 

[Blown376]

The rear diff can be a tad fragile if dumping the clutch. Swap it out with the SRX unit. Excessive wheel hop can cause the OE to break.

 

[Nick7550]

The rear diff can be a tad fragile if dumping the clutch. Swap it out with the SRX unit. Excessive wheel hop can cause the OE to break.

I thought GM threw a bigger rear diff in for the 2006-2007 models?

How much is the SRX unit? Like $700?