Chevy Small & Big Block Chrome Steel Crankshaft Pulley Bolt Kit

• Fine-thread hex bolts secure crankshaft pulley to snout for reliable operation

• Standard wrench fit for straightforward installation

• 3/8"-24 fine thread fits Chevy small block & big block crank pulleys

• 3-piece chrome steel set resists corrosion under the hood

Secure your crankshaft pulley with this 3-piece set of chrome steel hex head bolts, sized to a 3/8"-24 fine thread for Chevy small block and big block crank pulley applications. Hex heads accept a standard wrench or socket for straightforward installation.

This is a fine-thread (24 tpi) specification — different from the 16-tpi thread used on TSP's header bolt kits, so don't cross-reference bolt sizing between this kit and TSP's header hardware. Finished in polished chrome for a clean look at the front of the engine.

Always verify your pulley's bolt-hole pattern and crank snout thread match before ordering, since bolt patterns can vary between pulley designs.

Applications
Fits Chevy Small Block V8 (Gen I, 262–400 in³) and Big Block V8 (Gen II Mark IV, Gen V, Gen VI, 396–454 in³) crankshaft pulleys using a 3/8"-24 fine thread bolt pattern.

Installation
Confirm your pulley's bolt-hole pattern and crank snout thread match this kit before ordering. This is a fine-thread (3/8"-24) spec — different from TSP's 16-tpi header bolt kits — so don't substitute bolts between product lines.

Will this kit fit a small block Chevy 350?
Yes, the 5.7L/350 in³ is covered under Chevrolet Small Block V8 Gen I.

Will this kit also fit a big block Chevy 454?
Yes, the 454 is covered under Gen II (Mark IV), Gen V, and Gen VI Chevy big block platforms.

Can I use these bolts on my header instead of the crank pulley?
No. These use a fine 3/8"-24 thread specifically for crankshaft pulley mounting. TSP's header bolt kits use a coarser 3/8"-16 thread and are not interchangeable with this kit.

What tool do I need to install these bolts?
A standard box, open-end, or socket wrench — these are hex-head bolts.

Does this kit include water pump pulley bolts?
No. This kit is for crankshaft pulley mounting only. Water pump pulley hardware uses a different bolt specification.

Can I use this kit to replace missing crank pulley bolts?
Yes, provided your crankshaft pulley uses the same 3/8"-24 thread and 1" bolt length. Damaged or stripped threads should be repaired before installing new hardware.

Do I need to check my pulley before ordering, even if my engine is listed?
Yes. Pulley designs can vary, so verify your application requires a 3/8"-24 thread and 1" bolt length before ordering.