The jet kit I used was an actual Dynojet part number Q435. Excellent instructions. I have a GYTR intake without the lid and the DMC duals. Instructions recommended using almost the largest main jet. So far, starts easy and runs very strong for just the few upgrades. The kit comes with a new needle as well as a lot of main jets. Comes with a thin washer to make minor adjustments to the needle. Here is the LINK to the instructions to the Dynojet kit.