06vLo

Im putting my longtubes on monday and its gonna be a week or two b4 i can get a tune. Is there gonna be a big problem other than worse gas mileage?

JJSimon904

iTrader: (8)

You will be fine

meatyCTS-V

Feel free to refer back to this thread:

https://ls1tech.com/forums/cadillac-...results-2.html

-meaty

OriGinaL Condo

You won't need a tune at all. It'll help take advantage of the headers but it isn't necessary

whisler151

I went a 2 months before a tune. Quality Motorsports was not able to flash my pcm (lack of knowledge) and finally found SNL that did.

You will be fine.

Stone17

iTrader: (3)

Im 5 months with out a tune. I may be getting my car tuned this weekend.
Right now the CTS-V is getting better gas mileage now.

06vLo

well i finished the car up last night. I got a couple more zipties to buy so i can get some of the wires away from the driver side but thats it. Im very happy with the sound and like you guys said the car runs fine....My sotp dyno feels stronger and im tryin to decide on buying a ported mani and throttlebody or saving up for a heads and cam setup...

I went with a pacesetter armor coated with no cat setup to my magnaflow catback.