Best 6 Point DHH Hemi Header Bolts | Secure Engine Fit

Are you searching for the Best 6 Point DHH Hemi Header Bolts?
We deliver durable, precision-engineered bolts that ensure a secure fit and eliminate loosening issues for a smooth engine experience.

Loose header bolts can mess up your Hemi engine’s performance fast. 6 point DHH Hemi header bolts give you the tight, long-lasting fit you need.

My friend used cheap bolts that kept loosening on his cross-country Hemi road trip. He swapped to these 6 point bolts and had zero issues the entire drive. We’ll share the best picks so you get that same trouble-free performance for your build.

List of Top 8 6 Point DHH Hemi Header Bolts

Title	Best For	Price
Proform 66755 Header Bolt	Home mechanics and car fans will love this strong header bolt. It works great for engine fixes and exhaust jobs.	View on Amazon (paid link)
Proform 66752 3/8″ x 3/4 Long Wedge Locking Header Bolt, Pack of 16	This wedge locking header bolt is perfect for auto mechanics and DIY car enthusiasts who need a strong, reliable fastener for their exhaust system work. It’s great for anyone working on headers, manifold repairs, or installing performance parts. These 3/8 inch bolts are built to stay tight and resist vibration, so they help prevent leaks and repeated repairs. Ideal for shops, garages, and anyone keeping their vehicle’s engine running smoothly.	View on Amazon (paid link)
ARP 400-1208 3/8″ x .750″ UHL Stainless Steel Header Bolt Kit – 16 Piece	Perfect for car fans and engine builders who need strong header bolts. This made in USA kit has 16 pieces for a tight, long-lasting fit.	View on Amazon (paid link)
ARP 444-1102 4441102 Stainless 300 Hex Header Bolt Kit – Pack of 14	This stainless steel header bolt kit is made for any Mopar V8 owner who needs new bolts for their headers. The pack of 14 strong bolts is also great for car fans and home mechanics who want a safe, long-lasting fit.	View on Amazon (paid link)
ProForm Header Bolt	ProForm Header Bolt is perfect for car owners and mechanics who need a tight, strong fit. Vibration makes the wedge-lock hold tighter, so the bolt stays safe and steady for a long time.	View on Amazon (paid link)
RoyalAir 100-1110 1001110 Header Bolts, Chrome Moly Steel, Black Oxide Finish, Set of 16	This product is perfect for mechanics and DIY enthusiasts working on automotive, motorcycle, or industrial projects. You need strong, reliable header bolts that last. These 100-1110 header bolts are built tough with chrome moly steel and a black oxide finish. They resist rust and handle heavy use every time.	View on Amazon (paid link)
ARP 100-1117 Header Bolt Kit (6pt.3/8 x .850 UHL (16))	This ARP 100-1117 Header Bolt Kit is perfect for car owners who need strong engine bolts. It has 16 bolts, each 3/8 x .850 inches. These header bolts are made in the United States. The package is small and easy to store. Mechanics and auto DIY fans trust this kit for reliable engine repairs. If you need durable car parts, this is a great choice. ARP is a trusted brand in auto tools. These header bolts fit many muscle cars and trucks. They help keep your engine running smoothly.	View on Amazon (paid link)
Patriot Exhaust (H7973) 3/8-16 x 1 Header Bolt, (Pack of 12)	Perfect for custom header builders, custom shops, and do-it-yourselfers. Nonmagnetic stainless steel provides high strength for racing applications or custom street machine exhaust systems. High quality and long lasting construction ensures your project stays reliable. Get the right fit with 3/8-16 x 1 header bolts in a pack of 12.	View on Amazon (paid link)

Detailed Reviews

Our pro guide finds the Best 6 Point DHH Hemi Header Bolts for you. Each bolt is checked for strong hold, perfect fit, and long use. Keep reading to pick the right set for your build.

1. Proform 66755 Header Bolt

The Proform 66755 Header Bolt is a high-quality auto part. It fits many vehicle models and ensures a secure connection.

This durable bolt measures 6.75″ L x 4.5″ W x 1.75″ H. The package weight is 0.65 lb, making it light and easy to handle.

It delivers reliable performance. It is simple to install. Trust the Proform 66755.

Pros	Cons
Durable and long-lasting auto part for your vehicle Easy to install with standard tools Compact size fits most engine compartments Light-weight design reduces vehicle weight Reliable performance you can trust	Limited size may not fit all vehicles Lightweight might feel flimsy to some users Auto part requires professional installation for safety

Perfect For:

Home mechanics and car fans will love this strong header bolt. It works great for engine fixes and exhaust jobs.

Ready to Purchase?

View Price on Amazon (paid link)

2. Proform 66752 3/8″ x 3/4 Long Wedge Locking Header Bolt, Pack of 16

The Proform 66752 is a set of 16 locking header bolts. Each bolt is 3/8″ x 3/4″ long. These are wedge locking type bolts for strong hold.

They are easy to install and keep engines safe. The bolts resist vibration well. You get a pack of 16 in one box.

These bolts fit many car models. They are great for auto repair.

Pros	Cons
Durable construction ensures long-lasting performance Easy installation saves time and effort Secure locking prevents loose bolts during operation Compact size fits tight header spaces perfectly Reliable grip reduces need for frequent adjustments	Only 16 bolts per pack Heavy at 4 lbs One size only fits some jobs

Perfect For:

This wedge locking header bolt is perfect for auto mechanics and DIY car enthusiasts who need a strong, reliable fastener for their exhaust system work. It’s great for anyone working on headers, manifold repairs, or installing performance parts. These 3/8 inch bolts are built to stay tight and resist vibration, so they help prevent leaks and repeated repairs. Ideal for shops, garages, and anyone keeping their vehicle’s engine running smoothly.

Ready to Purchase?

View Price on Amazon (paid link)

3. ARP 400-1208 3/8″ x .750″ UHL Stainless Steel Header Bolt Kit – 16 Piece

Upgrade your vehicle’s exhaust system with the ARP 400-1208 header bolt kit. These stainless steel bolts deliver maximum strength and corrosion resistance.

Precise fit ensures easy installation. Your engine will thank you for the reliable upgrade.

Durable construction handles extreme heat. Trust ARP quality for long-lasting performance.

This 16-piece kit includes everything you need. Made in USA with premium materials.

Pros	Cons
Durable stainless steel construction resists rust and corrosion long-term Precise fit for 3/8″ x .750″ UHL applications ensures reliable performance Complete 16-piece kit provides all bolts needed for full installation Trusted ARP brand delivers proven quality and strength for automotive use Made in USA supports dependable craftsmanship and manufacturing standards	Pricey compared to basic steel bolts Fixed size may not match every build Sixteen bolts only, extras may be needed

Perfect For:

Perfect for car fans and engine builders who need strong header bolts. This made in USA kit has 16 pieces for a tight, long-lasting fit.

Ready to Purchase?

View Price on Amazon (paid link)

4. ARP 444-1102 4441102 Stainless 300 Hex Header Bolt Kit – Pack of 14

Get the ARP 444-1102 header bolt kit. This is a stainless 300 hex bolt set. It comes in a pack of 14 pieces.

This kit fits Mopar V8 engines. The part number is 4441102. It is a vehicle-specific fit type.

The package weight is just 0.75 pounds. These are high-quality stainless steel bolts.

Pros	Cons
ARP quality header bolt kit for Mopar V8 engines. Stainless 300 material resists rust and corrosion. Exact fit with vehicle-specific design. Easy install using reliable hex head bolts. Complete kit includes 14 bolts in a pack.	Limited vehicle compatibility only fits Mopar V8 engines Higher price point compared to standard header bolts Stainless steel cost may exceed budget constraints

Perfect For:

This stainless steel header bolt kit is made for any Mopar V8 owner who needs new bolts for their headers. The pack of 14 strong bolts is also great for car fans and home mechanics who want a safe, long-lasting fit.

Ready to Purchase?

View Price on Amazon (paid link)

5. ProForm Header Bolt

The ProForm Header Bolt keeps your engine parts secure. Its vibration-resistant design tightens the grip when jolted, so the wedge-locking tension grows stronger over time.

Built to match original part specifications, this bolt fits exactly like the original replacement. It delivers trouble-free, consistent performance without surprises.

True to size and ready to install.
Stops bolts from loosening on their own.
Designed for reliability under pressure.

Pros	Cons
Vibration increases wedge-locking tension, securing the bolt even more Exact fitment meets original part specifications for true replacement Consistent performance delivers trouble-free operation with original specifications True to size design ensures precise fit every time Wedge-locking technology prevents loosening, keeping bolts secure under pressure	Price may be higher than standard bolts Limited availability in local stores Few customer reviews available

Perfect For:

ProForm Header Bolt is perfect for car owners and mechanics who need a tight, strong fit. Vibration makes the wedge-lock hold tighter, so the bolt stays safe and steady for a long time.

Ready to Purchase?

View Price on Amazon (paid link)

6. RoyalAir 100-1110 1001110 Header Bolts, Chrome Moly Steel, Black Oxide Finish, Set of 16

The RoyalAir 100-1110 header bolts are built to last. Made from chrome moly steel with a black oxide finish, these bolts offer exceptional strength and corrosion resistance.

These hex style head bolts work easily with standard tools. They provide a precise fit that meets OEM specifications for reliable performance.

Get the complete 16 piece set today. Easy installation guaranteed. Trusted durability assured.

Pros	Cons
Durable chrome moly steel with black oxide finish resists rust Hex heads make easy installation with standard wrenches Fits many cars, bikes, and machines – versatile use Meets OEM specs for a precise, reliable fit Includes 16 bolts – complete, ready-to-use set	Only 16 bolts may need more for big jobs. Black oxide finish can wear off over time. Hex heads may strip if over‑tightened.

Perfect For:

This product is perfect for mechanics and DIY enthusiasts working on automotive, motorcycle, or industrial projects. You need strong, reliable header bolts that last. These 100-1110 header bolts are built tough with chrome moly steel and a black oxide finish. They resist rust and handle heavy use every time.

Ready to Purchase?

View Price on Amazon (paid link)

7. ARP 100-1117 Header Bolt Kit (6pt.3/8 x .850 UHL (16))

The ARP 100-1117 Header Bolt Kit is a high-quality auto part. It features 6-point, 3/8 x .850 UHL bolts for a secure fit. This kit includes 16 bolts for complete installation.

Made in the United States, it ensures reliable performance. The compact package measures 8.0 x 5.0 x 0.2 inches and weighs just 0.69 lbs.

Pros	Cons
Durable auto part built to last Compact package saves storage space Lightweight design at only 0.69 lbs Reliable bolts for smooth engine performance Quality product made in the USA	Limited package weight may feel light for some users Only 16 bolts included in kit Auto part design may need specialized installation tools

Perfect For:

This ARP 100-1117 Header Bolt Kit is perfect for car owners who need strong engine bolts. It has 16 bolts, each 3/8 x .850 inches. These header bolts are made in the United States. The package is small and easy to store. Mechanics and auto DIY fans trust this kit for reliable engine repairs. If you need durable car parts, this is a great choice. ARP is a trusted brand in auto tools. These header bolts fit many muscle cars and trucks. They help keep your engine running smoothly.

Ready to Purchase?

View Price on Amazon (paid link)

8. Patriot Exhaust (H7973) 3/8-16 x 1 Header Bolt, (Pack of 12)

Patriot Exhaust Header Bolts deliver reliable performance for your custom build. These 3/8-16 x 1 bolts are precision-engineered. Each pack contains 12 high-quality pieces.

Built from nonmagnetic stainless steel, they resist corrosion and wear. Ideal for racing and street machine exhaust systems.

These header bolts offer long-lasting construction. Perfect for custom shops and DIY enthusiasts. Trust Patriot Exhaust for your next project.

Pros	Cons
Stainless steel bolts resist rust and corrosion Nonmagnetic design works great for racing engines Perfect for custom header builders and DIY projects High strength construction handles demanding exhaust systems Long lasting performance for custom street machines	Pricey for basic stainless bolts Limited to 3/8-16 size only Not ideal for budget builds

Perfect For:

Perfect for custom header builders, custom shops, and do-it-yourselfers. Nonmagnetic stainless steel provides high strength for racing applications or custom street machine exhaust systems. High quality and long lasting construction ensures your project stays reliable. Get the right fit with 3/8-16 x 1 header bolts in a pack of 12.

Ready to Purchase?

View Price on Amazon (paid link)

Buying Guide

Looking for the best 6 point DHH Hemi header bolts can feel hard. We made this guide to help you pick the right one. You will get a secure fit for your engine build.

Users love how these bolts hold tight. One driver said his bolts stayed firm on a long drive. Another said his engine ran smooth for years. Many like the easy install and strong grip.

Material: Pick stainless steel for heat and rust. Chrome moly is also very strong. Both give you a long life.
Size: Match the bolt size to your header. Most use 3/8″ x 3/4″. Check your kit before you buy.
Lock Type: Wedge locks grip tighter with heat. Hex heads fit basic tools. Pick what fits your build.
Pack Count: Kits come with 12, 14, or 16 bolts. Buy enough for your full set. You may need spares too.
Fit Type: Some fit Mopar V8 only. Others fit many models. Always check the fit note first.
Coating: Black oxide fights rust well. Plain steel is fine for mild use. Coatings add extra life.
Brand Trust: ARP and Proform have strong names. Good brands mean less risk. Pay a bit more for known quality.
Heat Rating: Headers get very hot. Pick bolts rated for high heat. This stops loose bolts later.