Exhaust Manifold Header Stud Kit for 4.6L 5.4L Ford F250 F350 (1996-2013)

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Vehicle Fitment

• for Ford Crown Victoria:1992-2011, 4.6L V8 or 5.4L V8 as equipped.
• for Ford E-150:2003-2010, 4.6L V8 or 5.4L V8 as equipped.
• for Ford E-150 Econoline:1997-2002, 4.6L V8 or 5.4L V8 as equipped.
• for Ford E-250:2003-2013, 4.6L V8 or 5.4L V8 as equipped.
• for Ford E-350 Econoline:1997-2000, 4.6L V8 or 5.4L V8 as equipped.
• for Ford E-350 Super Duty:2004-2013, 4.6L V8 or 5.4L V8 as equipped.
• for Ford Excursion:2000-2005, 4.6L V8 or 5.4L V8 as equipped.
• for Ford Expedition:1997-2012, 4.6L V8 or 5.4L V8 as equipped.
• for Ford Explorer:2002-2010, 4.6L V8 or 5.4L V8 as equipped.
• for Ford F-150:1997-2010, 4.6L V8 or 5.4L V8 as equipped.
• for Ford F-250:1999, 4.6L V8 or 5.4L V8 as equipped.
• for Ford F-250 Super Duty:1999-2010, 4.6L V8 or 5.4L V8 as equipped.
• for Ford F-350 Super Duty:1999-2010, 4.6L V8 or 5.4L V8 as equipped.
• for Ford Mustang:1996-2009, 4.6L V8 or 5.4L V8 as equipped.
• Not complete for V10 engines:V10 applications need 20 studs and nuts.
• VIN check:Email service@egrperformance.com before ordering if unsure.

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What is an exhaust manifold stud kit?

An exhaust manifold stud kit replaces the factory bolts that hold your exhaust manifolds to the cylinder heads. Studs provide more even clamping force and are easier to install than bolts, especially on Ford 4.6L and 5.4L V8 engines. They're a must-have when replacing exhaust manifolds or headers.

What's included in this kit?

This kit includes 16 stainless steel studs and 16 stainless steel serrated flange nuts. That's enough hardware for both sides of a V8 engine. Everything you need to replace your factory exhaust manifold bolts is in one package.

Will this fit my Ford F-150 5.4L?

Yes, this exhaust manifold stud kit fits the Ford F-150 5.4L V8 for model years 1997 through 2010. It also fits the F-150 4.6L V8 from the same generation.

Does this fit Ford Mustang 4.6L?

Yes, this kit is compatible with the Ford Mustang 4.6L V8 from 1996 through 2009. It works with both two-valve and three-valve 4.6L engines in the Mustang lineup.

Will this fit my Ford Expedition 5.4L?

Yes, this stud kit fits the Ford Expedition 5.4L V8 for all model years 1997 through 2012. It also fits the 4.6L variant. Both engine sizes share the same exhaust manifold bolt pattern.

Does this fit Crown Victoria 4.6L?

Yes, this kit fits the Ford Crown Victoria 4.6L V8 from 1992 through 2011. The exhaust manifold stud specifications are identical across the entire Panther platform lineup.

What material are these studs made of?

These studs are made of premium grade A2-70 stainless steel. They're heat-treated for enhanced strength and durability. The stainless steel construction resists rust and corrosion far better than factory steel bolts.

Why are my exhaust manifold bolts breaking?

Factory exhaust manifold bolts rust and break over time due to constant heat cycles and road salt exposure. The 4.6L and 5.4L Ford V8 engines are especially prone to this issue. Upgrading to stainless steel studs eliminates this common problem permanently.

What size are these studs?

These studs are M8 x 50mm with a 1.25mm thread pitch. They're designed as a direct replacement for the factory exhaust manifold bolts on Ford 4.6L and 5.4L V8 engines. Always verify your thread pitch before ordering.

How many studs do I need for a V8 engine?

A V8 engine requires 16 studs total — 8 per cylinder head. This kit includes exactly 16 studs and 16 nuts, which is enough for both sides. V10 engines need 20 studs, so you'd need to buy 2 kits.

Can I use these for headers instead of manifolds?

Yes, these studs work perfectly for both factory exhaust manifolds and aftermarket headers. The stainless steel material and flange nuts provide a secure, leak-free seal that holds up to high exhaust temperatures.

How do I install exhaust manifold studs?

First, remove the old broken or rusted bolts from the cylinder head. Thread the new studs into the head by hand until they're seated. Slide the manifold or header over the studs, then install and torque the flange nuts to factory specification.

What tools do I need for installation?

You'll need a socket set, a torque wrench, penetrating oil for rusted bolts, and possibly a bolt extractor for broken studs. A stud installer tool can make the job easier but isn't required. Basic mechanical skills are recommended.

Do I need to use thread locker?

We recommend using a small amount of high-temperature thread locker on the stud threads that go into the aluminum head. This prevents the studs from backing out due to heat cycles. Don't use thread locker on the nut side — you may need to remove them later.

Will these fit Chevy 3.4L heads?

Yes, these studs also fit Chevy 3.4L heads. Please double-check that you need M8 x 50mm studs with 1.25mm thread pitch before ordering. The size must match exactly for proper fitment.

What is the warranty on this stud kit?

This exhaust manifold stud kit comes with a 90-day warranty against manufacturing defects. We also offer a 30-day free return policy for unused products. If you have any issues, contact service@egrperformance.com.

How long does shipping take?

Orders placed before 2 PM EST typically ship the same business day from our USA warehouse. Standard shipping takes 3–7 business days within the continental US. Expedited shipping options are available at checkout.

Can I return this if it doesn't fit?

Yes, we offer a 30-day free return policy for unused products in their original packaging. If you're unsure about fitment for your 4.6L or 5.4L Ford, email us your VIN first. Contact service@egrperformance.com to start a return.