I have a bone stock GSR..

would changing to the skunk2 IM WITHOUT touching anything else give me a noticeable difference? Other than adding maybe a 3 inch ITR CAI..

Can I use my stock obd2 ECU and will I retain the secondarys until I change the ECU?

 

in sort,

1, yes
2, it better to go ODB 1
3, no

 

no you will not feel that much of a difference. if your getting a great deal on the im, then go for it. i had ctr cams, i/h/e, bored out throttle body, and i lost power with the skunk im. i only felt a noticeable difference when i got the mugen program.

 

yes u wil notice a difference.. secondarys are in the IM itsself, so they will be gone, i would convert to obd1 using a harness and get a chipped p28 ecu