I dont see any difference while I was driving about 20 miles home with the New injectors from a friends shop, I just know at every red light or when I stop at a gas station and sat there, the AFR ratio with the NEW injectors read 19-20 AFR. The Old injectors at Idle it would be somewhere, 13.3-15.1 which is okay. this Wideband is Brand new and only 2 months old. I only been boosted for about 2 months. Tuned. I took out the New injectors because I was scared it might affect my motor seeing that the AFR was leaning pretty high at Idle, and Richening at 10.9-11 at full boost... I just dont understand how just swapping out OLD 440cc for New 440cc is going to affect it that bad...?