If I install SLP siamese runners onto my car, how will the system be affected running the Hypertech chip with all my other mods (see sig), would I be better off going back to stock chip, I know the best answer is to get one custom burned at this point but money is tight so of my two choices Hypertech or stock what would I be better off using and why. Also are all these runners typical or are there cold air with and without. Anything else I should be considering when buying a set. Would the year of the vehicle make a difference these are from an 86 Vette 350.

 

There are so few changes made in an off the shelf chip that it wouldn't make much difference which one you ran, stock or aftermarket. Custom tune is the only way to go to be sure to get the most of your combination.

The runners are the same for CSI applications 85-88, but different for 89+ models. While similar, the location and angles of some of the bolts are different.

I'm not sure what you're asking by "are there cold air with and without". Runners are runners and have nothing to do with any sort of aftermarket cold air intake set up...