General JB4 Map6 Tuning Question

[up4speed]

When adding a performance Downpipe, will the car tolerate MORE additive boost, or will it need less LESS additive boost than before the performance downpipe in order to run properly, and not pull timing?

 

[jimlloyd40]

If anything a tiny bit more to offset the tiny bit more power you'll have. It's maybe 10-15 HP