As an alternative, you can have them cleaned and flow tested. I bought a 540i rail and 8 injectors off of eBay and had them shipped to a business in Houston (Injector RX, I think). He cleaned the whole mess, flow tested them and sent them back to me with a little report card on each one showing they were within OE spec.

My google skilz show two places in MD. One is in Severna Park and the other is in Darlington.

All that said, I will likely replace all 8 the next time I have the intake off. At 23 years old I figure do it when the intake is off, or be forced to take the intake off when it is less convenient. I’m going to swap the M60 intake on my 4.6 for an OE 4.6 version at some point this year and will do it then.

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Current
Original owner 2002 E53 X5 4.4i to 4.6i swap
2026 G80 M3 6 spd
2025 G06 X5 50e
Former
1972 Audi Fox
1986 Saab 900S
1996 BMW Z3
1998 BMW E36 M3 Sedan
2004 BMW E46 M3
2006 Audi A3 Quatro
1993 Mopar 318 Jeep Grand Cherokee
2015 V6 Jeep Grand Cherokee