Engines and Components› Cylinder Heads and Components

SPEED PERF6RMANC3

Main Stud Kit

$178.00

SKU: FST-MAINSTUD

Special Order
Free Shipping over $200
$100 Minimum Order
Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Overview

The SPEED PERF6RMANC3 FST-MAINSTUD is a main stud kit developed by SPEED PERF6RMANC3 in conjunction with ARP, specifically for the Ecoboost motor. These main studs help maintain girdle stability at higher horsepower and RPM levels.
Show original supplier description
The SPEED PERF6RMANC3 FST-MAINSTUD is a main stud kit engineered in collaboration with ARP for the Ecoboost engine. This kit is crucial for maintaining the stability of the engine's girdle when pushing for higher horsepower and increased RPMs, preventing crankshaft movement. By utilizing these main studs, you can effectively eliminate issues like main cap walk and fretting, and ensure the protection of your engine block's threads. Constructed from 8740 chrome moly steel, these studs are heat-treated in-house to achieve a tensile strength of 200,000 psi. They feature precision J-form threads that are rolled after heat-treatment, resulting in a fastener that is reportedly 2000% stronger than others. Some applications may include provisions for mounting windage trays, featuring specially designed standoff studs with serrated lock nuts for secure positioning and locking. This product is specifically designed for the Ford 2.0L Ecoboost engine.

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Fitment

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Specifications

BrandSPEED PERF6RMANC3
Part NumberFST-MAINSTUD
CategoryEngines and Components
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Returns & Fitment

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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Shipping

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

Free shipping over $200 in the continental US. Alaska, Hawaii, U.S. territories (Puerto Rico, U.S. Virgin Islands, Guam, American Samoa, and the Northern Mariana Islands), and international orders carry surcharges — most appear at checkout. Some exceptions (LTL freight, or suppliers who quote freight only after we place the order) won’t. In those cases we’ll reach out with the exact charge before your order moves forward.

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