What do you find gives you more power?

[WICKEDOWESIX]

removing my cats did make me loose low end...i got an upgrade to street tune today at futral and he confirmed it. checked my previous stuff after the basic...ive got it back now and some. i had a hypertech before....definitely go custom tuning.

So if you got it back and then some how did you lose low end TQ?

 

[97yukon]

i got it back after he reprogrammed it through the street tune from the basic. the cats were cut after the basic tune. im not gunna argue with you bro.