Product Description:
Hawks Motorsports is pleased to offer our clients the LS1/LS2 Camshaft Retainer Plate Bolt Kit, ARP Part Number 134-1002. This high-performance ARP fastener kit is designed for the camshaft retainer plate used on Chevrolet LS-series engines. The kit uses M8 x 1.25 bolts with a 20mm under-head length and 10mm hex heads. ARP identifies 134-1002 for Gen III/IV LS-series camshaft retainer plate applications.
When you're putting an LS together, the small details matter. The cam retainer plate is responsible for keeping the camshaft properly located, so having the correct fasteners is important when assembling an engine—especially a performance build. ARP's 134-1002 kit gives LS builders purpose-built high-strength fasteners rather than relying on generic hardware.
ARP states that its cam fasteners provide increased preload clamping force to help maintain positive timing-gear register and are designed to withstand valvetrain harmonics and stress. The bolts also feature an enlarged head flange and reduced socket-head size to aid installation and removal.
KEY FEATURES
- ARP Part Number: 134-1002
- LS1/LS2 camshaft retainer plate bolt kit
- Gen III/IV LS-series application
- Set of 4 bolts
- M8 x 1.25 thread
- 20mm under-head length
- 10mm hex head
- 8740 chrome moly construction
- Approximately 180,000 psi tensile strength for the High Performance version
- Black oxide finish
- Precision-machined fasteners
- Reduced head size for easier socket access
- Enlarged head flange for cam-button retention
- Designed specifically for LS camshaft retainer plate applications
PRODUCT SPECIFICATIONS / PRODUCT DETAILS
| Specification | Details |
|---|---|
| Manufacturer | ARP |
| Part Number | 134-1002 |
| Product Type | Camshaft Retainer Plate Bolt Kit |
| Application | LS1 / LS2 |
| Engine Family | GM Gen III/IV LS |
| Quantity | Set of 4 |
| Thread Size | M8 x 1.25 |
| Under-Head Length | 20mm / .787" |
| Head Style | Hex |
| Socket Size | 10mm |
| Material | 8740 Chrome Moly |
| Finish | Black Oxide |
| High Performance Rating | 180,000 psi |
| Shipping Weight | 0.10 lb |
| Shipping Dimensions | 6.00" × 4.00" × 0.50" |
ARP's catalog identifies 134-1002 as the Gen III/IV LS cam retainer plate fastener with a 20mm under-head length, M8 x 1.25 thread and 10mm socket size.
VEHICLE FITMENT / FITS THE FOLLOWING MODELS
Verified Engine Applications
- Chevrolet LS1 5.7L
- Chevrolet LS2 6.0L
- Gen III LS applications using the applicable camshaft retainer plate
- Gen IV LS applications using the applicable camshaft retainer plate
ARP's current product information identifies 134-1002 for Chevrolet LS-series Gen III applications, while ARP's catalog identifies the fastener for Gen III/IV LS cam-retainer-plate applications.
Additional LS Applications
Current application data from specialty retailers also lists 134-1002 for additional LS-family engines, including LS3, LS7, LS9, LSA, L76, L77, L98, LM7 and LY2 applications. Because application can depend on the specific camshaft retainer plate configuration, customers using an engine outside the LS1/LS2 applications should verify the retainer plate before ordering.
IMPORTANT APPLICATION NOTES AND EXCLUSIONS
- 134-1002 is a camshaft retainer plate bolt kit.
- It is not the camshaft sprocket bolt.
- The kit contains four bolts.
- Thread size is M8 x 1.25.
- Under-head length is 20mm.
- Head/socket size is 10mm.
- Verify the camshaft retainer plate configuration before ordering.
- Current application information identifies this fastener for the applicable flat-style cam retainer plate. Countersunk retainer plate applications require different fasteners.
- 134-1003 is the separate ARP camshaft sprocket bolt kit and should not be substituted for 134-1002.
- Vehicle year alone should not be used to determine fitment on an engine-swapped vehicle.
INSTALLATION NOTES
ARP's installation instructions specify:
- Clean and inspect all fasteners before installation.
- Clean the female threads to ensure proper engagement and accurate torque readings.
- Apply ARP Ultra-Torque Fastener Assembly Lubricant to the bolt threads and underside of the bolt heads.
- Tighten the four bolts using a crisscrossing pattern.
- ARP specifies a final torque of 25 ft-lbs for this application.
Always follow the current ARP installation instructions for the product being installed.
FREQUENTLY ASKED QUESTIONS
What is ARP 134-1002?
ARP 134-1002 is a camshaft retainer plate bolt kit for Chevrolet LS-series engines.
How many bolts are included?
The kit contains four bolts.
What size are the bolts?
The bolts are M8 x 1.25, with a 20mm under-head length and a 10mm hex head.
What are the bolts made from?
ARP identifies the fasteners as 8740 chrome moly steel.
Does 134-1002 fit an LS1?
Yes. ARP identifies 134-1002 as an LS1 cam retainer bolt kit, and current application information supports LS1 use.
Does 134-1002 fit an LS2?
Yes, when the engine uses the applicable camshaft retainer plate configuration.
Is 134-1002 the LS cam sprocket bolt?
No. 134-1002 is the camshaft retainer plate bolt kit. ARP lists 134-1003 separately for the camshaft sprocket.
What torque does ARP specify?
ARP's installation instructions specify 25 ft-lbs, using a crisscrossing tightening pattern.
Will this work with a countersunk cam retainer plate?
Not necessarily. Application information identifies 134-1002 for the applicable flat cam retainer plate configuration. Verify the retainer plate design before ordering.
What is the difference between 134-1002 and 134-1003?
134-1002 is for the camshaft retainer plate, while 134-1003 is the camshaft sprocket bolt kit.
