I haven’t necessarily noticed an issue specifically with my injectors, but I’ve heard that many have noticed improvements when buying the “new” 4 hole injectors. I looked through some older posts and found a few people selling them by themselves for cheaper but wasn’t sure if those were still options. But I’ve found a couple options online
injector rehab - seems like best option, pretty sure they show a video on the improvements as well
eBay - only a little more expensive then injector rehab, comes from a Volvo and looks new, but worried about authenticity
Ksuspension- seems similar to injector rehab but very long wait time.
will likely choose one of the first two but would prefer buying from a specific person. Any available? Thanks.