So, I've got a VF2 redline. Already fitted the HSV 2.5" cat back, and am wanting to fit a set of extractors for a bit more noise/go before I get it tuned. Don't plan on a tune for another 6 or so months though. I'm not sure what to do. Thoughts are: Get a set of Advance shorty Tri-Ys that fit to the factory cats. That way, no dash light so I don't have to tune straight away. Is it even worth doing this though, considering i'll keep the factory cats? Alternately, grab a set of Empire brand headers with hi-flow cats. Direct bolt up fitment, and weld up some more sensor bungs to hopefully avoid the dash light coming on. These look good and are relatively affordable. Rhino also have a similar set that look OK. Both brands are 1 7/8". Finally, do I just bite the bullet and go DPE. Having a hard time justifying the $1870 I've been quoted to have them supplied and fitted though. What do you guys think? TIA.