551664 SBC Intake Manifold Bolt Kit 3/8-16, Grade 8.8, 12 pcs
$32.09
- $5.99 shipping from United States View details
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- ✓ STOP BOTTOM OUT & VACUUM LEAKS – Our precisely machined 3/8-16 thread bolts deliver uniform clamping force across your intake manifold, effectively eliminating vacuum leaks and ensuring optimal engine performance on your Chevy 265-400 Small Block. Perfect for securing both stock and aftermarket aluminum intakes (Edelbrock, Holley, Weiand).
- ✓ GRADE 8.8 PREMIUM 10B21 STEEL – NO SEIZING & NO GALLING Forged from high-grade 10B21 boron steel (SAE standard) with multi-layer zinc coating. Optimized for cold heading & heat treated to Grade 8.8 for consistent clamping force. Prevents galling, seizing & corrosion in aluminum cylinder heads. TRUE 3/8-16, NOT 10mm.
- ✓ FLANGED HEAD DESIGN – NO WASHERS NEEDED – The integrated flange head distributes load evenly across the manifold surface, removing the guesswork and hassle of dealing with separate washers. This design provides a clean, factory-like appearance while speeding up your engine assembly.
- ✓ PRECISE LENGTH – NO BOTTOMING OUT – Unlike generic bolt kits, this set includes the precise length required for standard Gen I SBC heads (1955-1995), preventing the “bottoming out” issue before achieving proper torque. NOT for BBC/Big Block, NOT for Vortec heads.
- ✓ 12PC COMPLETE KIT + TORQUE SPECS PROVIDED – This full set includes everything you need, with the recommended torque sequence and specifications clearly illustrated in the product images. No more searching forums—just reference the chart and get back to building your classic Chevy.
- Free 30-Day Returns
- Full Refund for Damaged or Incorrect Items
- Guaranteed Delivery or Money Back
- Secure Checkout & Fast Support
- ✓ STOP BOTTOM OUT & VACUUM LEAKS – Our precisely machined 3/8-16 thread bolts deliver uniform clamping force across your intake manifold, effectively eliminating vacuum leaks and ensuring optimal engine performance on your Chevy 265-400 Small Block. Perfect for securing both stock and aftermarket aluminum intakes (Edelbrock, Holley, Weiand).
- ✓ GRADE 8.8 PREMIUM 10B21 STEEL – NO SEIZING & NO GALLING Forged from high-grade 10B21 boron steel (SAE standard) with multi-layer zinc coating. Optimized for cold heading & heat treated to Grade 8.8 for consistent clamping force. Prevents galling, seizing & corrosion in aluminum cylinder heads. TRUE 3/8-16, NOT 10mm.
- ✓ FLANGED HEAD DESIGN – NO WASHERS NEEDED – The integrated flange head distributes load evenly across the manifold surface, removing the guesswork and hassle of dealing with separate washers. This design provides a clean, factory-like appearance while speeding up your engine assembly.
- ✓ PRECISE LENGTH – NO BOTTOMING OUT – Unlike generic bolt kits, this set includes the precise length required for standard Gen I SBC heads (1955-1995), preventing the “bottoming out” issue before achieving proper torque. NOT for BBC/Big Block, NOT for Vortec heads.
- ✓ 12PC COMPLETE KIT + TORQUE SPECS PROVIDED – This full set includes everything you need, with the recommended torque sequence and specifications clearly illustrated in the product images. No more searching forums—just reference the chart and get back to building your classic Chevy.
There are few things more frustrating than nearing the end of a long engine rebuild, only to have your momentum halted by a set of incorrect or seized intake manifold bolts. You're torquing down that final fastener on your freshly rebuilt Chevy 350, and you feel it bottom out before it's tight. Or worse, a year later, you're chasing a mysterious idle problem caused by a vacuum leak from uneven clamping pressure. That's the exact headache SANHLSKJ set out to eliminate.
SANHLSKJ engineers understand the nuances of classic American V8s. Our SBC Intake Manifold Bolt Kit is more than just a bag of fasteners; it's a comprehensive solution designed to ensure a leak-proof seal between your intake manifold and cylinder heads. Machined to exacting specifications from premium 10B21 boron alloy steel (SAE standard), heat treated to Grade 8.8 for reliable, long-lasting clamping strength. Ideal for stock & performance intake manifolds, ensuring leak-free performance for years. Each 3/8-16 bolt provides consistent, reliable clamping force that prevents warping and vacuum leaks—critical for both stock cast-iron and performance aluminum intakes from manufacturers like Edelbrock, Holley, and Weiand.
Why Choose SANHLSKJ SBC Intake Bolts?
Precision Fitment, Guaranteed: We provide the correct length for standard Gen I heads (1955-1995) to prevent the "bottoming out" issue reported with other kits. No more trips back to the hardware store.
Anti-Seize Protection: Our advanced multi-layer zinc coating isn't just for rust prevention. It acts as a barrier to prevent the electrochemical reaction that causes bolts to gall and seize in aluminum heads—saving you from a potential nightmare during future disassembly.
Flanged for Efficiency: The integrated flange head eliminates the need for separate washers, providing a clean, professional look while ensuring even load distribution across the manifold's mounting surface.
True Size: 3/8-16 standard thread, NOT 10mm – avoids misfit and return headaches.
Whether you're a seasoned weekend mechanic breathing new life into a classic muscle car, or a first-time builder assembling a budget-friendly stroker in your garage, this 12-piece kit provides the confidence and reliability you demand. Stop searching through bins of mismatched hardware and start building with parts engineered for your passion.
Click 'Add to Cart' and secure the seal on your next Small Block Chevy masterpiece.
Q&A:
Q: What is the correct torque specification for these intake bolts on a Chevy 350 with aluminum heads?
A: For the best seal on aluminum cylinder heads, we recommend a final torque of 25-30 ft-lbs following the proper tightening sequence. Please refer to the product images (Torque Chart Image) where we have provided a clear, printable torque sequence chart for your convenience.
Q: Do these intake manifold bolts require thread sealant or Loctite on a small block Chevy?
A: Yes, we highly recommend applying a liquid PTFE thread sealant (not Teflon tape) to the threads of intake manifold bolts. This is critical for preventing oil wicking up the threads and causing seepage on the manifold. Our zinc coating prevents galling, so thread locker is not needed.
Q: Will these 3/8-16 bolts fit my aftermarket Edelbrock Performer intake manifold?
A: Absolutely. The SANHLSKJ SBC bolt kit is engineered to fit both stock OEM cast-iron and all major aftermarket aluminum intakes, including Edelbrock Performer, Holley Street Dominator, and Weiand Action Plus, for 1955-1995 Small Block Chevy engines.
Q: I'm rebuilding a Chevy 400 small block. Are these the correct length bolts?
A: Yes, this kit is a direct fit for the Chevy 400 SBC. The bolts are the correct length for standard Gen I small block Chevy cylinder heads, ensuring you achieve full thread engagement without bottoming out in the blind holes.
Q: Is the zinc coating on these Grade 8.8 bolts strong enough to prevent rust over time?
A: Our bolts feature a multi-layer zinc electroplating that provides excellent corrosion resistance for the under-hood environment. This coating is specifically chosen to protect against surface rust while also acting as a barrier to prevent galling when threading into aluminum cylinder heads.
Q: Does this kit come with washers or are the bolts flanged?
A: This kit includes flanged head bolts, so no separate washers are required. The integrated flange provides a clean, professional appearance and distributes the clamping load evenly across the manifold surface for a secure, leak-proof seal.
Q: How many bolts come in this SBC intake kit?
A: This is a complete 12-piece kit, providing the exact number and lengths of bolts needed to securely fasten the intake manifold on any standard 1955-1995 Chevy Small Block V8 engine.
Q: Are these Grade 10.9 or Grade 8.8?
A: These are high-strength Grade 8.8 steel bolts with multi-layer zinc coating, ideal for SBC intake manifold applications.
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|---|---|---|
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