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Repair kit RK-4101 — kit contents diagram
Kit contents diagram (one injector set shown). Injector shown for reference only — not included.
RK-4101

Fuel Injector Service Kit — Rebuild Set RK-4101

  • FKM O-ring, 7.52*3.53 mm ×1 per injector
  • PTFE seal, 13.3*7.9*1 mm ×1 per injector
  • PTFE seal, 13.3*7.9*1 mm ×1 per injector
  • PTFE seal, 7.8*6.1*3.4 mm — ASNU265 ×2 per injector
  • Micro filter, 6*3*10.7 mm — ASNU02 ×1 per injector
  • Rubber seal, 15.2*7.3*10 mm — ASNU203 ×1 per injector

Fitment at a glance

Injector OE number — being updated by the manufacturer

Fits many American cars, including Chevrolet and Buick models. The manufacturer's application list is being updated — match the part sizes listed above to your injector before ordering, or contact us and we will confirm fitment.

Match the number on your injector body before ordering.

Set for 1 injector7 pieces total · SKU RK-4101-1 · assembled to order $11.99Buy Set for 4 injectorsFull engine set28 pieces total · SKU RK-4101-4 · assembled to order $25.99Buy Set for 6 injectors42 pieces total · SKU RK-4101-6 · assembled to order $39.99Buy Set for 8 injectors56 pieces total · SKU RK-4101-8 · assembled to order $51.99Buy

Assembled to order — ships in 5–7 business days, then 2–5 days USPS transit in the US.

  • Secure checkout by Stripe
  • Free tracked USPS shipping in the US
  • Assembled to order in Irvine, CA
  • 30-day returns on unused parts
  • Questions? Contact us before you buy

Shop-grade rebuild set for one fuel injector. If you flow-test and service these injectors, this is the full wear-part set: 7 pieces per injector - micro filter, FKM O-rings and seals, all dimension-matched to OE.

Kit contents (per injector)

FKM O-ring, 7.52*3.53 mmFKM O-ring, 7.52*3.53 mm×1 per injectorPTFE seal (flat), 13.3*7.9*1 mmPTFE seal (flat), 13.3*7.9*1 mm×1 per injectorPTFE seal (split), 13.3*7.9*1 mmPTFE seal (split), 13.3*7.9*1 mm×1 per injectorPTFE seal, 7.8*6.1*3.4 mm — ASNU265PTFE seal, 7.8*6.1*3.4 mm — ASNU265×2 per injectorMicro filter, 6*3*10.7 mm — ASNU02Micro filter, 6*3*10.7 mm — ASNU02×1 per injectorRubber seal, 15.2*7.3*10 mm — ASNU203Rubber seal, 15.2*7.3*10 mm — ASNU203×1 per injector

Assembled to order - ships in 5-7 business days. Sold as sets for 1, 4, 6, 8 injectors.

Fits many American cars, including Chevrolet and Buick models. The manufacturer's application list is being updated — match the part sizes listed above to your injector before ordering, or contact us and we will confirm fitment.

Fitment

Injector application — fitment list being updated
Injector / engineNote
RK-4101Fits many American cars — application list being updated by the manufacturer

Fits many American cars, including Chevrolet and Buick models. The manufacturer's application list is being updated — match the part sizes listed above to your injector before ordering, or contact us and we will confirm fitment.

Not sure it fits? Send us your injector part number or engine code via the contact page and we'll confirm before you buy.

Micro-filter basket removal tool
Add the removal tool — $14.99

The old basket filter has to come out before the new one goes in. This hook tool pulls it in seconds — no scoring the injector bore, no fishing with a pick.

Buy the tool

Fitting this kit — the job in 6 steps

1

Make it safe

Relieve fuel pressure (pump fuse out, run the engine dry) and disconnect the battery.

2

Reach the rail

Remove the intake parts in the way and unplug each injector connector.

3

Pull the injectors

Unbolt the fuel rail and lift the injectors straight out. Keep them in cylinder order.

4

Strip the old parts

Remove the old PTFE seals and O-ring. Pull the old micro filter out with the removal tool. Never scratch the nozzle tip.

5

Fit the new parts

Press in the new micro filter, fit the O-ring with a light coat of clean engine oil, and seat the new PTFE seals flush.

6

Reinstall and check

Rail back on, bolts torqued to spec. Prime the pump and inspect every injector for leaks before the first start.

Fuel is flammable — no sparks or smoking, work in a ventilated space. Direct-injection fuel pressure can injure skin; keep hands clear of any spray. Not set up for it? A shop can fit this kit in about an hour.