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Exterior Components› Body Panels and Components

Holley

.150in Needle & Seat Assembly

$57.95 $46.76 Save $11.19

SKU: H00E 6-521

In Stock
In Stock
Ships by Jul 29
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Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Description

The Holley 6-521 is a needle and seat assembly featuring a .150" orifice and a titanium needle. This design offers responsiveness to flow rate changes and excellent sealing capabilities.

Fitment

Fitment Guaranteed

Don’t gamble
on fit.

Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.

Available on iOS & Android

Specifications

BrandHolley
Part NumberH00E 6-521
Weight0.04 lb

Buy with Confidence

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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