- Home Page /
- Automotive /
- Performance Parts & Accessories /
- Exhaust Systems & Parts /
- Headers & Accessories /
- Header Bolts /
- 8900 Locking Header Bolt Kit for GM Small Blo...
0 ratings
Item #:
2348
8900 Locking Header Bolt Kit for GM Small Block
Item #:
2348
NZD 172
Price Details
Excluding Shipping & Custom charges ( Shipping and custom charges will be calculated on checkout )
*All items will import from US
Afterpay Information
Split your bill into 4 payments of NZD 43 interest-free
Add the item to your cart
Select Afterpay at checkout
Fill in your details
Complete your first payment
and pay the remaining in easy instalments or according to the payment plan you selected
Here’s why you should Afterpay it
Get everything you need now..
Shop thousands of brands and millions of products, online and in-store.
Pay over six weeks.
Make the first payment upfront and the rest over time. Always interest-free when you pay it in 4.
No fees when you pay on time.
We’ll send you reminders and cap late payments to help you get back on track.
(1) Terms and conditions. apply. (2) Installment Agreement. (3) Eligible for customers in. New Zealand, (4) Your final payment plan may vary depending on your credit history.
0 ratings
Write a review
In stock
Imported from USA store
QTY:
Order now and get it around Monday, July 13
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
Grade 8 bolts will not stretch when hot
Buy Now Pay Later
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
Durable Construction
Crafted from high-grade materials, this locking header bolt kit ensures long-lasting performance and resistance against wear, giving confidence in high-performance applications.
Enhanced Engine Stability
Designed specifically for GM Small Block engines, it provides superior bolt locking, preventing header leaks and maintaining optimal engine performance under extreme conditions.
Easy Installation
The innovative design allows for quick and tool-free installation, saving time and effort for both DIY enthusiasts and professional mechanics.
Product Details
- Grade 8 bolts resistant to stretching when hot
- Duplex nickel finish for corrosion resistance and superior look
- Double hex head with 3/16 inch recessed allen head for easy installation
- Removable and reusable locking header bolts
- Allows visual inspection without needing to put a wrench on for tightness check
- Includes 12 locking header bolts, 12 locking retainers, and clips
| Item Weight | 1.8 lbs (820 grams) |
Who Should Buy?
-
Performance Enthusiasts
Ideal for car enthusiasts looking for a reliable method to secure headers during high-performance applications.
-
Engine Builders
Perfect for those assembling or rebuilding GM small block engines requiring high-quality fastening solutions.
-
DIY Mechanics
Great for DIY mechanics who want a straightforward solution for header installation/removal without repeated loosening.
-
Casual Drivers
Not necessary for drivers who use their vehicles primarily for normal commuting with no performance modifications.
-
Budget-Conscious Users
May not be suitable for users prioritizing low-cost solutions over advanced fastening technology in installations.
-
Non-GM Vehicles
Incompatible with vehicles that do not have a GM small block engine, limiting its universal applicability.
Product Description
8900 Locking Header Bolt Kit for GM Small Block
Have any Query? Chat with us
Customer Questions & Answers
-
Question:
How many bolts are included in this kit?
Answer: There are 12 bolts included in this kit. -
Question:
Can these bolts be reused?
Answer: Yes, these bolts are removable and reusable. -
Question:
Does the double hex head include an allen head?
Answer: Yes, the double hex head includes a 3/16 inch recessed allen head. -
Question:
Will the kit work on a small block 327?
Answer: No, they are for LS1. You would need 8911 for the older small block. -
Question:
Will this kit work on 6.0?
Answer: Yes, all LS motors have the same bolt needs for their exhaust. -
Question:
Will this fit a 93 Firebird 5.7 LT1?
Answer: To be 100% sure, I recommend going to their web page and looking them up. However, if an LT-1 uses the same size as an LS-1/LS-6, then yes it will. -
Question:
Are they 8mmx25mm?
Answer: Yes, per the description they are 8 millimeter 1.25 X 25 millimeter 6 point bolts with a double hex head. -
Question:
Will this fit on a 2000 Sierra 4.8?
Answer: No, they did NOT fit my 1997 GMC Sierra. I had to re-install the stock bolts. -
Question:
Will these work on a 1999 2 Door Tahoe with the 5.7 Vortec?
Answer: Be careful, I think the 99 Tahoe was still the LT style motors, which have SAE fasteners. All the LS series engines have metric, which is what these bolts are.
Stage 8 Header Bolts Editorial Review
No editorial reviews found
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
Platform Trust & Buyer Confidence
NA
Naylz
Verified buyer
“Purchased a YAMATIC 3/4" Shaft Horizontal Pressure Washer Pump 3400 PSI 2.5 GPM as a replacement for my GC190 water blaster. Fits perfectly and works well. Easy transaction and reasonable delivery to New Zealand.”
6 June 2026 · via Trustpilot
EG
Eduardo
Verified buyer
“great service, quick delivery and comunication”
2 June 2026 · via Trustpilot
DR
Dave
Verified buyer
“First time using Ubuy. Simple to use, well packed and faster than expected delivery. Was about the only way to get this item I've been after for almost a year … thank you Ubuy!”
15 May 2026 · via Trustpilot
DD
David
Verified buyer
“First time using Ubuy and very impressed. Items arrived from the USA super fast and are such a top-quality product. I will definitely be back to purchase again. Cannot recommend you highly enough for a hassle-free & efficient service. Thank you so much. I am one very happy customer.”
14 May 2026 · via Trustpilot
J
John
Verified buyer
“Very happy with the light. I wanted something a little different for a bedside lamp and find this is great. Easy to operate with a single button to turn it off and on and control the brightness and colour temperature. The item was sent quickly and a hassle free purchase.”
23 April 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.
NZD 172
Order now and get it around Monday, July 13
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
- Locking header bolt kit for GM small block
- Includes 12 grade 8 bolts with a double hex head
- Duplex nickel finish for superior look and corrosion resistance
- Removable and reusable
- Can visually inspect for tightness
- No need to put a wrench on for checking tightness
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.