The Story
---!@!start!@!---Specifications---!@!end!@!---
| Type | Head Bolt |
| Head Bolt1 Spec |
Thread: 7/16 - 14 UNC; Pitch: 14 TPI; Diameter: 7/16 inch; Length: 55 mm |
| Head Bolt 2 Spec |
Thread: 7/16 - 14 UNC; Pitch: 14 TPI; Diameter: 7/16 inch; Length: 88 mm |
| Head 3 Spec |
Thread: 7/16 - 14 UNC; Pitch: 14 TPI; Diameter: 7/16 inch; Length: 106 mm |
| Washer Size | 20.7*11.2*3mm |
| Package Content |
16×Head Bolt 1; 4×Head Bolt 2; 14×Head Bolt 3; 34×Washers ; 1×Lubricating Grease; 1×Neutral Instruction Manual |
| Material | High-Strength 42CrMo Alloy Steel |
| Tensile Strength | 210,000 PSI |
| Yield Strength | 210,000 PSI |
| Fitment |
Chevrolet Small Block 1955-1957 Chevy small block Gen I 4.3L/265 1957-1967 Chevy small block Gen I 4.6L/283 1962-1969 Chevy small block Gen I 5.4L/327 1967-1968 Chevy small block Gen I 4.9L/302 1967-2000 Chevy small block Gen I 5.7L/350 1968-1973 Chevy small block Gen I 5.0L/307 Stock configuration 1970-1980 Chevy small block Gen I 6.6L/400 1976-2000 Chevy small block Gen I 5.0L/305 Stock configuration 1979-1982 Chevy small block Gen I 4.4L/267 Stock configuration |
| Engine Fitment | 265, 283, 302, 305, 307, 327, 350, 400 |
---!@!start!@!---Description---!@!end!@!---
EVIL ENERGY SBC Head Bolt Kit for Chevy 350 & Gen I Engines
Upgrade your engine's structural integrity with the EVIL ENERGY SBC Head Bolt Kit. This high-performance small block chevy head bolt kit is precision-engineered for Gen I engines, providing a superior alternative to standard Chevy 350 head bolts. Whether rebuilding a classic 305 Chevy or a high-horsepower 350 SBC, this SBC bolt kit ensures a professional-grade seal.
1. Precision SBC Head Bolt Thread Size & Fitment
Our bolts feature the standard SBC head bolt thread size of 7/16 - 14 UNC. This SBC bolt kit includes all three necessary SBC head bolt sizes (55mm, 88mm, and 106mm) to accommodate the varied deck heights and casting requirements of small block Chevy head bolts.
2. 210K PSI Strength for 350 SBC Head Bolts
While standard head bolts for 350 Chevy often feature 180K PSI, our Chevy 350 bolt kit is rated at 210,000 PSI tensile strength. This ensures that even under high compression, your SBC head bolts will not stretch, preventing head gasket failure in performance 350 Chevy head bolt applications.
3. Premium 42CrMo Alloy Construction
Durability is key for Chevy 350 head bolts. Made from 42CrMo high-strength alloy steel, these small block Chevy head bolts offer better heat resistance than OEM parts. It’s the ultimate SBC head bolt solution for 1955–2000 Chevy head identification and restoration projects.
Why Choose EVIL ENERGY for Your Small Block Chevy Head Bolts?
- 210K PSI Dual Strength for Extreme Reliability: Each EVIL ENERGY Head Bolt is rated at 210K PSI tensile & yield strength (surpasses common 180K PSI OEM bolts), offering unmatched clamping force. These Cylinder Head Bolts resist breakage and prevent cylinder head leaks in turbocharged, supercharged, racing, or heavy-duty Chevy Small Block applications.
- 42CrMo Alloy Steel for Engine Durability: Built from premium 42CrMo alloy steel, the EVIL ENERGY Head Bolt Kit ensures the perfect balance of hardness, toughness, and heat resistance. Engineered to withstand extreme heat and fatigue in 1955–2000 Chevy 265/283/302/350/400 engines, these bolts significantly outlast standard steel fasteners.
- Cost-Effective vs. Stud Kits: More affordable than head stud systems, the Chevy Head Bolt Kit provides premium strength without unnecessary expense. Perfect for OEM replacement or budget-friendly performance builds, while fitting all Chevy Small Block Gen I (4.3L–6.6L) engines with precision.
- Easy Installation for DIY & Repairs: One-piece integrated Head Bolt design threads directly into the engine block, reducing installation steps compared to stud kits. This makes the EVIL ENERGY Cylinder Head Bolt Kit ideal for both professional mechanics and DIY enthusiasts, requiring no extra tools
- Complete Ready-to-Use Kit: Includes 16×55mm + 4×88mm + 14×106mm Head bolts, 34×20.7×11.2×3mm washers, lubricating grease, and instruction manual—no extra parts required for immediate installation.
How to Measure SBC Head Bolt Size Correctly
Accurate measurement is the key to successful 350 SBC head bolts installation. Follow these steps to verify your hardware:
- Check Thread Pitch: Use a gauge to confirm the SBC head bolt thread size is 7/16 - 14 UNC.
- Measure Underhead Length (UHL): Use a digital caliper to measure from the underside of the bolt head to the tip of the threads. Do not include the bolt head height in your measurement.
- Identify the Three Lengths: Your sbc head bolt kit should contain three sizes: Short (55mm), Medium (88mm), and Long (106mm).
- Confirm Washer Fitment: Always use the included 3mm washers to ensure the head bolts for the 350 Chevy don't bottom out in the block.
Technical Installation & Torque Tips
For the best results with your small-block Chevy head bolts, follow the factory torque sequence:
- Preparation: Clean all block threads with a 7/16-14 thread chaser to ensure the SBC head bolt thread size matches perfectly.
- Lubrication: Apply the included grease to the threads and under the bolt head to achieve accurate torque for your Chevy 350 head bolts.
- Sequence: Follow a three-step torque process in the standard small block Chevy criss-cross pattern to prevent cylinder head warping.
Details & Craftsmanship
Every detail has been carefully considered to bring you the perfect product.
Details & Craftsmanship
Every detail has been carefully considered to bring you the perfect product.
Details & Craftsmanship
Every detail has been carefully considered to bring you the perfect product.
Details & Craftsmanship
Every detail has been carefully considered to bring you the perfect product.
Details & Craftsmanship
Every detail has been carefully considered to bring you the perfect product.
Details & Craftsmanship
Every detail has been carefully considered to bring you the perfect product.
Details & Craftsmanship
Every detail has been carefully considered to bring you the perfect product.
Description
---!@!start!@!---Specifications---!@!end!@!---
| Type | Head Bolt |
| Head Bolt1 Spec |
Thread: 7/16 - 14 UNC; Pitch: 14 TPI; Diameter: 7/16 inch; Length: 55 mm |
| Head Bolt 2 Spec |
Thread: 7/16 - 14 UNC; Pitch: 14 TPI; Diameter: 7/16 inch; Length: 88 mm |
| Head 3 Spec |
Thread: 7/16 - 14 UNC; Pitch: 14 TPI; Diameter: 7/16 inch; Length: 106 mm |
| Washer Size | 20.7*11.2*3mm |
| Package Content |
16×Head Bolt 1; 4×Head Bolt 2; 14×Head Bolt 3; 34×Washers ; 1×Lubricating Grease; 1×Neutral Instruction Manual |
| Material | High-Strength 42CrMo Alloy Steel |
| Tensile Strength | 210,000 PSI |
| Yield Strength | 210,000 PSI |
| Fitment |
Chevrolet Small Block 1955-1957 Chevy small block Gen I 4.3L/265 1957-1967 Chevy small block Gen I 4.6L/283 1962-1969 Chevy small block Gen I 5.4L/327 1967-1968 Chevy small block Gen I 4.9L/302 1967-2000 Chevy small block Gen I 5.7L/350 1968-1973 Chevy small block Gen I 5.0L/307 Stock configuration 1970-1980 Chevy small block Gen I 6.6L/400 1976-2000 Chevy small block Gen I 5.0L/305 Stock configuration 1979-1982 Chevy small block Gen I 4.4L/267 Stock configuration |
| Engine Fitment | 265, 283, 302, 305, 307, 327, 350, 400 |
---!@!start!@!---Description---!@!end!@!---
EVIL ENERGY SBC Head Bolt Kit for Chevy 350 & Gen I Engines
Upgrade your engine's structural integrity with the EVIL ENERGY SBC Head Bolt Kit. This high-performance small block chevy head bolt kit is precision-engineered for Gen I engines, providing a superior alternative to standard Chevy 350 head bolts. Whether rebuilding a classic 305 Chevy or a high-horsepower 350 SBC, this SBC bolt kit ensures a professional-grade seal.
1. Precision SBC Head Bolt Thread Size & Fitment
Our bolts feature the standard SBC head bolt thread size of 7/16 - 14 UNC. This SBC bolt kit includes all three necessary SBC head bolt sizes (55mm, 88mm, and 106mm) to accommodate the varied deck heights and casting requirements of small block Chevy head bolts.
2. 210K PSI Strength for 350 SBC Head Bolts
While standard head bolts for 350 Chevy often feature 180K PSI, our Chevy 350 bolt kit is rated at 210,000 PSI tensile strength. This ensures that even under high compression, your SBC head bolts will not stretch, preventing head gasket failure in performance 350 Chevy head bolt applications.
3. Premium 42CrMo Alloy Construction
Durability is key for Chevy 350 head bolts. Made from 42CrMo high-strength alloy steel, these small block Chevy head bolts offer better heat resistance than OEM parts. It’s the ultimate SBC head bolt solution for 1955–2000 Chevy head identification and restoration projects.
Why Choose EVIL ENERGY for Your Small Block Chevy Head Bolts?
- 210K PSI Dual Strength for Extreme Reliability: Each EVIL ENERGY Head Bolt is rated at 210K PSI tensile & yield strength (surpasses common 180K PSI OEM bolts), offering unmatched clamping force. These Cylinder Head Bolts resist breakage and prevent cylinder head leaks in turbocharged, supercharged, racing, or heavy-duty Chevy Small Block applications.
- 42CrMo Alloy Steel for Engine Durability: Built from premium 42CrMo alloy steel, the EVIL ENERGY Head Bolt Kit ensures the perfect balance of hardness, toughness, and heat resistance. Engineered to withstand extreme heat and fatigue in 1955–2000 Chevy 265/283/302/350/400 engines, these bolts significantly outlast standard steel fasteners.
- Cost-Effective vs. Stud Kits: More affordable than head stud systems, the Chevy Head Bolt Kit provides premium strength without unnecessary expense. Perfect for OEM replacement or budget-friendly performance builds, while fitting all Chevy Small Block Gen I (4.3L–6.6L) engines with precision.
- Easy Installation for DIY & Repairs: One-piece integrated Head Bolt design threads directly into the engine block, reducing installation steps compared to stud kits. This makes the EVIL ENERGY Cylinder Head Bolt Kit ideal for both professional mechanics and DIY enthusiasts, requiring no extra tools
- Complete Ready-to-Use Kit: Includes 16×55mm + 4×88mm + 14×106mm Head bolts, 34×20.7×11.2×3mm washers, lubricating grease, and instruction manual—no extra parts required for immediate installation.
How to Measure SBC Head Bolt Size Correctly
Accurate measurement is the key to successful 350 SBC head bolts installation. Follow these steps to verify your hardware:
- Check Thread Pitch: Use a gauge to confirm the SBC head bolt thread size is 7/16 - 14 UNC.
- Measure Underhead Length (UHL): Use a digital caliper to measure from the underside of the bolt head to the tip of the threads. Do not include the bolt head height in your measurement.
- Identify the Three Lengths: Your sbc head bolt kit should contain three sizes: Short (55mm), Medium (88mm), and Long (106mm).
- Confirm Washer Fitment: Always use the included 3mm washers to ensure the head bolts for the 350 Chevy don't bottom out in the block.
Technical Installation & Torque Tips
For the best results with your small-block Chevy head bolts, follow the factory torque sequence:
- Preparation: Clean all block threads with a 7/16-14 thread chaser to ensure the SBC head bolt thread size matches perfectly.
- Lubrication: Apply the included grease to the threads and under the bolt head to achieve accurate torque for your Chevy 350 head bolts.
- Sequence: Follow a three-step torque process in the standard small block Chevy criss-cross pattern to prevent cylinder head warping.
