Repair kit RK-4101 — kit contents diagram

OE Repair Kits

Fuel Injector Repair Kit — RK-4101

Name: Fuel Injector Repair Kit — RK-4101
Brand: Partsapiens
Price: 25.49 USD
Availability: InStock

$25.49

Complete fuel injector seal and filter kit: micro filter, FKM O-rings and seals, 7 pieces per injector. Assembled to order — ships in 5-7 business days. Fits many American cars; application list is being updated — match the listed sizes to your injector or contact us to confirm fitment.

Assembled to order in California — please allow 5-7 business days before shipping. Injector not included; photo shows one injector with the kit parts for reference.

US shipping only for now • 30-day returns • Secure Stripe checkout

Details

Complete seal and filter kit for one fuel injector. Every wear part on the injector gets replaced: 7 pieces per injector, including the micro filter, FKM O-rings and seals matched to the original dimensions.

In the kit (per injector):

FKM O-ring, 7.52*3.53 mm x1
PTFE seal, 13.3*7.9*1 mm x1
PTFE seal, 13.3*7.9*1 mm x1
PTFE seal, 7.8*6.1*3.4 mm — ASNU265 x2
Micro filter, 6*3*10.7 mm — ASNU02 x1
Rubber seal, 15.2*7.3*10 mm — ASNU203 x1

Kits are assembled to order in California from bulk components - please allow 5-7 business days before shipping. Choose the set size that matches your engine: 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.

Kit contents (per injector)

FKM O-ring, 7.52*3.53 mm×1 per injector

PTFE seal (flat), 13.3*7.9*1 mm×1 per injector

PTFE seal (split), 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

Fitting this kit — the job in 6 steps

Make it safe

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

Reach the rail

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

Pull the injectors

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

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.

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.

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.