Back fire

[Jeffer]

I have the 22. T7

And went to a black widow headers and ankrapovik silencer.  Now especially high altitudes backfiring, crackling off gas. Do i need remapping to richen it up? Also lost some midrange power but gained low end. Really want the midrange power back

[Wintersdark]

If you removed the cat (presumably as you said Black Widow headers) you need a flash.

[Robo]

Replaced the whole system on my 21 with a full black widow system. Didn’t like the loss of low/mid range so put the stock headers back on with the black widow can. It crackles a little bit, mainly below 4500rpm  but nothing too bad. Have you got any leaks anywhere, like at the start of the headers? A remap would definitely help. 

Edited October 10, 2022 by Robo

[winddown]

Backfiring is a sign of richness not leanness, it's excess fuel burning in the headers.  If all else is good in the motor it's not a sign to worry about if it happens when you are decelerating.  If it happens at other times though?    Like @wintersdark said, you need to flash if you want to be sure you're not doing long term damage.

Edited October 14, 2022 by winddown