Product Description:
Hawks Motorsports is pleased to offer our clients the following 434-1202 LS1/LS6/LS2/LS3/LS7 12-Point Stainless Steel Header Bolts, Set of 12, ARP. This ARP header bolt kit is designed for Chevrolet LS Gen III and Gen IV applications using headers with a 3/8-inch-thick flange. The kit includes 12 M8 header bolts with a 12-point head, 30mm (1.181-inch) underhead length, and polished stainless steel construction. ARP identifies this application for Chevrolet LS-series Gen III and Gen IV engines.
When you're putting together an LS engine, header hardware is one of those details that can make the difference between a clean, finished engine bay and a pile of generic fasteners fighting for room around the tubes. The compact 12-point heads make it easier to get a socket onto the bolts in tight header areas, while the polished stainless finish gives the engine bay the kind of clean, finished look that belongs on a properly sorted LS build. Whether you're freshening up a street car, finishing an LS swap, or assembling a performance combination, these are the kinds of small details gearheads notice.
The 434-1202 uses M8 x 1.25 threads, a 30mm / 1.181-inch underhead length, and a 12-point head designed for a 10mm socket. ARP specifies this version for a 3/8-inch-wide header flange and sells it as a 12-piece kit. ARP's catalog also identifies the bolts as stainless steel and notes that the bolt kits come with washers.
KEY FEATURES
- ARP Part Number: 434-1202
- Product Type: Exhaust header bolt kit
- Quantity: 12 bolts
- Material: Stainless steel
- Finish: Polished
- Head Style: 12-point
- Thread Size: M8 x 1.25
- Underhead Length: 30mm / 1.181"
- Socket Size: 10mm 12-point
- Designed for a 3/8-inch-wide header flange
- Designed for Chevrolet LS Gen III/Gen IV applications
- Compact head design helps provide socket access around header tubes
- ARP identifies the bolts as stainless steel with a nominal tensile strength of 180,000 psi
- Washers are included according to ARP catalog information.
PRODUCT SPECIFICATIONS
| Specification | Details |
|---|---|
| Brand | ARP |
| Part Number | 434-1202 |
| Product Type | Header Bolt Kit |
| Quantity | 12 |
| Material | Stainless Steel |
| Finish | Polished |
| Head Style | 12-Point |
| Thread | M8 x 1.25 |
| Underhead Length | 30mm / 1.181" |
| Socket Size | 10mm |
| Header Flange | 3/8" |
| Application | Chevrolet LS Gen III / Gen IV |
| Washers | Included per ARP catalog |
ARP's current product page confirms the 434-1202 as the SBC Gen III/LS 3/8-inch flange stainless 12-point header bolt kit, with 12 bolts, M8 thread and 1.181-inch UHL.
VEHICLE FITMENT / FITS THE FOLLOWING MODELS
Chevrolet LS Applications
- LS1
- LS6
- LS2
- LS3
- LS7
The supplied Hawks product information specifically identifies LS1, LS6, LS2, LS3 and LS7 applications. ARP's manufacturer documentation identifies the broader application as Chevrolet LS Series Gen III and Gen IV.
Important: Fitment is application-specific and also depends on the header flange configuration. The 434-1202 is intended for a 3/8-inch-wide header flange.
IMPORTANT APPLICATION NOTES AND EXCLUSIONS
- Designed for LS-series applications using a 3/8-inch header flange.
- Uses M8 x 1.25 threads.
- Underhead length is 30mm / 1.181 inches.
- This is the stainless-steel 12-point version.
- Verify the header flange thickness before ordering.
- Do not substitute the 434-1202 based solely on engine family; the header flange configuration must also be compatible.
- ARP lists a separate 20mm / 0.984-inch stainless 12-point part number, 434-1201, for 1/4-inch-wide header flanges.
- This listing should not be used to establish vehicle-specific fitment where the actual header application has not been verified.
INSTALLATION NOTES
- Verify header flange thickness and bolt requirements before installation.
- Confirm the header uses the required M8 x 1.25 thread.
- Start fasteners by hand to prevent cross-threading.
- Follow the current ARP installation and torque recommendations.
- Use the manufacturer's recommended tightening sequence where applicable.
- Inspect header clearance around the bolt heads and surrounding tubes before final tightening.
- Recheck the installation after initial operation and heat cycling as appropriate for the application.
FREQUENTLY ASKED QUESTIONS
How many bolts are included?
The ARP 434-1202 is sold as a set of 12 header bolts.
What engines does the 434-1202 fit?
ARP identifies the 434-1202 for Chevrolet LS Series Gen III and Gen IV applications. Hawks identifies the product for LS1, LS6, LS2, LS3 and LS7 applications.
What size are the bolts?
The bolts use an M8 x 1.25 thread and have a 30mm / 1.181-inch underhead length.
What type of head do these bolts have?
The 434-1202 uses a 12-point head designed for a 10mm socket.
What are the bolts made from?
The 434-1202 is constructed from ARP stainless steel with a polished finish.
What header flange thickness are these bolts designed for?
The 434-1202 is specified for a 3/8-inch-wide header flange.
Are washers included?
ARP's catalog identifies its header bolt kits as being supplied with washers.
What is the difference between 434-1202 and 434-1201?
The 434-1202 is the 30mm / 1.181-inch version for a 3/8-inch header flange. ARP lists 434-1201 as the 20mm / 0.984-inch version for a 1/4-inch header flange.
