- Home Page /
- Automotive /
- Automotive Replacement Parts /
- Exhaust & Emissions /
- Headers & Parts /
- Header Bolts /
- 8911A 1" Locking Header Bolt Kit for GM Small...
0 ratings
Item #:
121708160
8911A 1" Locking Header Bolt Kit for GM Small Block
Item #:
121708160
€ 70
Price Details
Excluding Shipping & Custom charges ( Shipping and custom charges will be calculated on checkout )
*All items will import from US
0 ratings
Write a review
In stock
Imported from USA store
Order now and get it around Tuesday, July 28
Secured transaction
Ubuy works hard to protect your security and privacy. Our advanced payment security system ensures confidentiality by encrypting your information during transmission using AES (Advanced Encryption Standards) and SSL (Secure Socket Layer) protocols. Your payment details are 100% secure as we do not share your payment details with third party sellers.
Our Top Logistics Partners
Upgrade your engine with Stage 8 Locking Header Bolt Kit – the ultimate solution for security and reliability!
Fast
Shipping
Free
Return*
Secure Packaging
100% Original Products
PCI DSS Compliance
ISO 27001 Certified
Note: Step Down Voltage Transformer required for using electronics products of US store (110-120). Recommended power converters Buy Now.
What Stands Out
Precision Fit
Engineered specifically for GM Small Block, ensuring a perfect fit and compatibility. This reduces the risk of leaks and malfunctions, securing your engine's performance with utmost reliability and safety.
Durable Construction
Crafted from high-quality materials that withstand extreme pressure and temperatures. This locking header bolt kit provides long-lasting durability, outperforming competitors and ensuring engine integrity over time.
Enhanced Performance
Designed to improve exhaust flow and engine efficiency, this kit optimizes performance. Unlock more power from your GM Small Block while reducing maintenance needs, giving you exceptional value for your investment.
Product Details
| Thread Size | 3/16 inch (802.6 cm) |
| Exterior Finish | Nickel |
| Manufacturer Grade | Grade 8 |
| Screw Head Style | Hex |
| Fastener Type | Hexagon Bolt |
| Thread Type | Unc |
| Thread Style | Right Hand |
| Item Hardness | Grade 8 |
| Head Type | Double Hex |
| Thread Class | 3A |
| Grade Rating | Grade 8 |
| Compatible Groove Diameter | 1 Inches (2.5 cm) |
| Material Type | Nickel |
| Finish Types | Glossy |
| Size Name | Small |
| Fastener Size | 3/16 inch (802.6 cm) |
| Thread Coverage | Fully Threaded |
| Item Dimensions | 3.24 x 2.41 x 1.3 inches (8.2 x 6.1 x 3.3 cm) |
| Brand | Stage 8 |
| UPC | 765709891112 |
| Set Name | Kit |
| Global Trade Identification Number | 00765709891112 |
| Manufacturer | Stage 8 |
| Number Of Items | 1 |
| Model | 8911A |
| Part Number | 8911A |
| Unit Count | 1 Count |
| Included Components | SBC LONG HD/BLT |
| Item Type Name | SBC LONG HD/BLT |
| Material | Nickel |
| Head Style | Hex |
Who Should Buy?
-
Performance Enthusiasts
Ideal for automotive enthusiasts looking to upgrade their GM Small Block engines with reliable and secure header bolts.
-
Mechanics and Technicians
Professional mechanics will appreciate the durability and effectiveness of this bolt kit for ensuring proper header installation.
-
Custom Builders
Designed for custom car builders needing robust components that withstand high-performance conditions and heavy usage.
-
Casual Drivers
Not suitable for everyday drivers who may not need high-performance locking bolts for standard or stock engine setups.
Product Description
8911A 1" Locking Header Bolt Kit for GM Small Block
Have any Query? Chat with us
Customer Questions & Answers
-
Question:
What sizes of GM small block does this kit fit?
Answer: It fits GM small block engines ranging from 265 to 400 cu/inches. -
Question:
Are these bolts reusable?
Answer: Yes, the bolts are designed to be removable and reusable. -
Question:
What material are the bolts made from?
Answer: The bolts are made from Grade 8 steel, ensuring they will not stretch when hot.
Stage8 Header Bolts Editorial Review
The 8911A 1" Locking Header Bolt Kit for GM Small Block has garnered a generally positive response from users who appreciate the product's main features and benefits. Customers find the locking header bolts effective in preventing loosening after installation, which is a Considerable advantage over standard bolts. Many users report a significant reduction in the need for Constant tightening, with several expressing satisfaction after months of use without any concerns regarding leaks or bolt stability. The kit is praised for its innovation, featuring a design that allows for easy installation with either an allen wrench or a regular wrench, depending on space Constraints. However, some users have noted that slight modifications may be required for optimal fit on certain header setups. The inclusion of information about these modifications has been viewed positively, as it assists users in achieving the best performance from the bolts. While the product boasts high-quality Construction and effectively tightens headers without inducing leaks, a few criticisms arise regarding the pricing. Some customers feel that for the cost—approximately $70—the kit should include extra locking tabs and circlips. Additional complaints have documented a perceived lack of engineering finesse, particularly concerning the alignment of hex fasteners. This has led to concerns over the bolts' usability in future removal scenarios and has resulted in some expressing reluctance to purchase again. Overall, the 8911A Locking Header Bolt Kit is viewed favorably for its ability to secure headers efficiently, though potential buyers should be aware of the need for minor adjustments during installation and the Considerations regarding the price. **
Customer Reviews & Ratings
1 customers ratings
-
5 Star
100%
-
4 Star
0%
-
3 Star
0%
-
2 Star
0%
-
1 Star
0%
Review this product
Share your thoughts with other customers
Pros
- Effectively prevents loosening of header bolts
- High-quality Construction ensures no leaks
- Easy installation with various tool compatibility
- Customer support provided through modification guidance
Cons
- May require slight modifications for some setups
Platform Trust & Buyer Confidence
MT
Mohd
Verified buyer
“The product received very good packaging & safe…Thank You”
16 June 2026 · via Trustpilot
SJ
Shawati
Verified buyer
“Accurate delivery timing given”
16 June 2026 · via Trustpilot
YB
Youcef
Verified buyer
“Not madly expensive like I thought, and much quicker than promised.”
15 June 2026 · via Trustpilot
LM
Leila
Verified buyer
“Never dealt with Ubuy before, but everything worked out great. Seamless cross border purchasing and shipping. Thanks!”
6/7/2026 · via Trustpilot
KA
Kwame
Verified buyer
“The process was smooth, with clear communication and timelines. This was my 1st purchase and I am really impressed. I will definitely be coming back.”
12 June 2026 · via Trustpilot
Secure Checkout
Global Delivery
Easy Returns
Genuine Products
Product Price History
Important information
- Limitations : For products shipped internationally, please note that any manufacturer warranty may not be valid; manufacturer service options may not be available; product manuals, instructions, and safety warnings may not be in destination country languages; the products (and accompanying materials) may not be designed in accordance with destination country standards, specifications, and labeling requirements; and the products may not conform to destination country voltage and other electrical standards (requiring use of an adapter or converter if appropriate). The recipient is responsible for assuring that the product can be lawfully imported to the destination country. When ordering from Ubuy or its affiliates, the recipient is the importer of record and must comply with all laws and regulations of the destination country.
- Not all the products listed on Ubuy are for sale, as Ubuy is a global search engine. Products are subject to export/trade regulations.
€ 70
Order now and get it around Tuesday, July 28
This item is not restrict in my country.(Please click on above link if this item is not restrict in your country, So our team will review and allow.)
QTY:
Secured transaction
PCI DSS compliant and ISO 27001:2022 certified, with encrypted payments and full buyer protection on every order.
Our Top Logistics Partners
Fastest cross-border delivery
Features & Benefits
- Includes 12 Grade 8 locking header bolts for GM small block 265 - 400 cu/inches.
- Features a double hex head with 3/16 inch recessed allen head for effortless installation.
- Boasts a durable duplex nickel finish for enhanced aesthetics and corrosion resistance.
- Designed to be removable and reusable, offering long-term value.
- Allows for easy visual inspection without needing a wrench for check tightness.
- Guaranteed to maintain tightness even under high temperatures, ensuring engine performance.
Ubuy Assurance
Experience worry-free shopping with 100% original products, PCI DSS-compliant payment security, ISO 27001-certified data protection, the fastest cross-border delivery, free returns *, and secure packaging on every order.