Whether you are replacing damaged main studs or you’re doing a complete engine upgrade. This ARP Main Stud Kit for your 2.3L EcoBoost engine will fulfill your main stud hardware needs. This American made kit is constructed from 8740 Chromoly steel for extreme strength and prolonged durability. The components in this main stud kit are precision centerless-ground and thread-rolled to Mil-S-8879 specs. A corrosion-resistant black oxide finish is applied to protect your new engine components from the extreme conditions found under your hood. To complete your new main stud kit, hardened washers and high-strength hex nuts are included.
Features and Benefits:
– Constructed of 8740 Chromoly steel
– Black oxide finish
– 200,000 PSI yield-strength rating
– Precision centerless-ground and thread-rolled to Mil-S-8879 specs
– Includes hardened washers
– Includes high-strength hex nuts
– Made in the USA
– Easy to install
Specifications:
– Main Bolt Style: 2-bolt
– Fastener Style: Stud
– Fastener Nut Style: Standard Hex Head
– Fastener Yield Strength (psi): 190,000 psi
– Nuts Included: Yes
– Washers Included: Yes
– Fastener Finish: Black Oxide
– Fastener Material: 8740 Chromoly Steel
Applications:
– 2015-2017 Mustang EcoBoost
– 2016-2017 Focus RS
FREQUENTLY ASKED QUESTIONS
If it's in stock and ready to roll, your order usually hits the road within 1–3 business days.
For made-to-order or specialty items (like carbon fiber parts or custom builds), the turnaround can take up to 8 weeks — perfection takes time.
Either way, we'll keep you updated so you know exactly when your parts are leaving the pit lane.
Absolutely! Once your order ships, you'll receive an email with a tracking link so you can follow its journey from our shop to your doorstep.
If your order ships via freight, you'll get a separate email with a direct link to the carrier's tracking page — easy and stress-free.
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