Product Description
ARP 134-3609 High Performance Cylinder Head Bolt Kit
Fits 1997-2003 Gen 3 LS 4.8L 5.3L 5.7L 6.0L Engines | Early LS Head Bolt Kit with 155mm, 100mm & 45mm Bolts
Upgrade your Gen 3 LS cylinder head fasteners with the ARP 134-3609 High Performance Cylinder Head Bolt Kit. Designed for 1997-2003 LS-based 4.8L, 5.3L, 5.7L, and 6.0L engines using the early head bolt configuration, this ARP kit provides application-specific high performance head bolts for cylinder head installation, engine rebuilds, head gasket service, and performance LS builds. ARP high performance bolts are cold-forged for strength, heat treated before thread rolling and machining, and rated nominally at 190,000 psi. Hardened, parallel-ground washers are included to help promote even load distribution and accurate torque readings during installation. This kit is intended for early 1997-2003 Gen 3 LS blocks that use 8 long 155mm bolts, 2 100mm bolts, and 5 45mm bolts per cylinder head.
Key Features & Benefits
- Correct Early Gen 3 LS Head Bolt Kit: ARP 134-3609 is designed for 1997-2003 LS-based engines using the early head bolt layout. This kit is the correct choice for blocks that require 8 long 155mm bolts, 2 100mm bolts, and 5 45mm bolts per cylinder head.
- High Performance ARP Construction: ARP high performance head bolts are cold-forged to help ensure molecular integrity, then heat treated before thread rolling and machining. They are rated nominally at 190,000 psi for dependable clamping strength in stock and performance LS applications.
- Application-Specific LS Fasteners: This head bolt kit is built for early Gen 3 LS engine applications, making it ideal for head gasket replacement, cylinder head service, engine rebuilds, performance upgrades, and LS combinations requiring stronger-than-stock head bolt hardware.
- Includes Hardened Parallel-Ground Washers: Hardened and parallel-ground washers are included to help distribute load evenly and support accurate torque readings. Proper washer quality is critical for consistent clamping force and reliable cylinder head installation.
- Reduced Hex & Wide Flange Design: ARP HP head bolts feature a reduced wrenching hex and wide area flange, helping improve installation access and reducing the need for valvetrain removal when re-torqueing cylinder heads on compatible setups.
Important Fitment Notes
- Verify Before Ordering: GM used two different LS head bolt configurations. Confirm your block year and required bolt lengths before purchase.
- 1997-2003 Blocks: Use 8 155mm bolts, 2 100mm bolts, and 5 45mm bolts per cylinder head.
- 2004-2014 Blocks: Use 10 100mm bolts and 5 45mm bolts per cylinder head. This ARP 134-3609 kit is not the correct bolt configuration for those later blocks.
Notes
- Brand: ARP
- Part Number: 134-3609
- Product Type: High performance LS cylinder head bolt kit.
- Engine Compatibility: Fits 1997-2003 Gen 3 LS-based 4.8L, 5.3L, 5.7L, and 6.0L engines using the early head bolt layout.
- Bolt Strength Rating: Rated nominally at 190,000 psi.
- Washer Style: Includes hardened, parallel-ground washers.
- Recommended Use: Cylinder head installation, head gasket replacement, LS engine rebuilds, performance engine builds, cylinder head swaps, and early Gen 3 LS head bolt upgrades.
Key Fitments
- 1997-2003 Gen 3 LS-based engine applications
- 1997-2003 4.8L LS-based engine applications
- 1997-2003 5.3L LS-based engine applications
- 1997-2003 5.7L LS1 / LS6 engine applications
- 1997-2003 6.0L LS-based engine applications
- Early Gen 3 LS blocks using 155mm long head bolts
- LS cylinder head installation applications requiring ARP 134-3609
- Fitment note: Fits early 1997-2003 LS blocks using 155mm head bolts.
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Quality part and fast shipping , customer service is A++
A+!
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Fantastic
As always ARP is the best.
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ARP head bolts for LQ4
ARP is the best source of automotive fasteners I know of. Fasteners are an important component of any build . they will make it or break it.
