Chevy Big Block Chrome Steel Hex Head Intake Manifold Bolt Kit

• Set of 16 chrome steel hex head bolts for a complete BBC intake install.

• Includes washers; 1 1/4" thread length supports proper clamp load.

• Fits Chevy BBC Gen II/V/VI 396-454 CID and AMC V8 290-401 CID engines.

• Chrome hex head finish gives a clean, upgraded look over stock bolts.

This TSP Chevy Big Block Chrome Steel Hex Head Intake Manifold Bolt Kit includes sixteen 3/8"-16 hex head bolts with a 1 1/4" thread length and matching washers, sized to install an intake manifold on the Chevrolet big block V8 family. The 1 1/4" thread length is built to support proper clamp load across the intake flange without bottoming out in compatible cylinder heads.

This kit fits the Chevrolet Big Block V8 Gen. II (Mark IV) in 396, 402, 427, and 454 CID, Gen. V in 454 CID, and Gen. VI in 454 CID, as well as the AMC V8 across 290, 304, 343, 360, 390, and 401 CID. Before installing, verify head style, torque sequence, gasket thickness, and manifold flange depth against your specific engine combination.

Common uses include street performance builds, restoration projects, and custom engine assemblies where a complete, correctly sized hex head chrome bolt set is needed for intake installation.

Fastener Specs
Sixteen 3/8"-16 chrome steel hex head bolts, 1 1/4" thread length, washers included.

Installation
Verify head style, torque sequence, gasket thickness, and manifold flange depth before final assembly to confirm the 1 1/4" thread length is correct for your combination without bottoming out in the head.

What size are these bolts?
This kit includes sixteen hex-head intake manifold bolts with matching washers. Each bolt features a 3/8"-16 thread and a 1-1/4-inch length.

Does this fit AMC V8 engines?
Yes. In addition to Chevrolet big block applications, this kit fits AMC V8 engines, including the 290, 304, 343, 360, 390, and 401 CID engine families.

Will this fit a 427 or 454 big block?
Yes. This bolt kit is compatible with Chevrolet Gen II/Mark IV 427 and 454 big block engines, as well as Gen V and Gen VI 454 applications.

What's the difference between this kit and the 12-point head version?
Both kits include the same quantity of bolts, use the same 3/8"-16 thread and 1-1/4-inch length, and fit the same engine applications. The only difference is the bolt head style: this kit uses traditional hex-head bolts, while the other uses 12-point heads. The choice comes down to your preferred tool engagement and clearance requirements during installation.

Are washers included?
Yes. The kit includes all sixteen intake manifold bolts along with matching washers.

Will this fit a Gen V or Gen VI 454?
Yes. This kit is designed to fit both Gen V and Gen VI Chevrolet 454 big block engines.