Piston Pins - Tool Steel & DLC for LS, K20, 2JZ, RB & Coyote

What This Piston Pin Collection Covers

Wrist pins for forged pistons

A wrist pin joins each piston to its connecting rod. The correct pin diameter, length and wall thickness are determined by the piston and rod combination.

Pins and retention hardware

This collection includes replacement pins, upgraded pins and wire locks. Always use the exact retention method specified for the piston.

Materials and Construction

9310 alloy steel

9310 alloy steel is a common choice for high strength wrist pins in boosted, high rpm and competition engine combinations.

Wall thickness and weight

A thicker wall can increase strength while a lighter pin can help reduce reciprocating mass. Select a pin only from the piston manufacturer approved options.

Fitment and Measurement

Critical dimensions

Verify pin outside diameter, overall length, wall thickness, end treatment and piston bore before ordering. Similar looking parts can have different dimensions.

Rod and piston matching

The small end bushing, piston pin bore and lock groove must all match the intended pin and retention system.

Assembly Practices

Clean handling

Keep pins, bores and locks clean during assembly. Lubricate according to the engine builder and piston manufacturer instructions.

Wire lock installation

Install wire locks with the proper tool and verify that each lock is fully seated in its groove before the engine is rotated.

Top Piston Pin Brands

CP Carrillo

CP Carrillo provides 9310 steel wrist pins and upgrade options for forged piston combinations.

JE Pistons

JE Pistons offers straight wall pins and wire locks for performance engine assembly.

Wiseco

Wiseco supplies 9310 piston pins for many forged piston applications.

Manley

Manley provides alloy wrist pin sets for Ford and performance V8 builds.

Diamond Pistons

Diamond Pistons supports high output forged piston applications with matched internal components.

How to Choose the Correct Option

• Match the wrist pin to the exact piston part number whenever possible.
• Measure pin diameter, length and wall thickness before ordering a replacement.
• Confirm whether the pin needs chamfered or non chamfered ends.
• Use the manufacturer approved material and surface treatment for the power level.
• Verify the connecting rod small end size and bushing condition.
• Use the specified wire locks or retainers for the piston.
• Check lock grooves for damage and clean them before assembly.
• Follow piston clearance and lubrication guidance from the manufacturer.
• Do not mix pins among pistons without measurement and builder approval.
• Have a qualified engine builder verify dimensions for high output builds.

Common Questions

What is a piston pin?

A piston pin, also called a wrist pin, connects the piston to the small end of the connecting rod and allows the joint to pivot during engine operation.

Are piston pins universal?

No. Pins must match the piston pin bore, connecting rod small end and intended retention system. Verify dimensions and the piston part number.

What is a 9310 wrist pin?

9310 is a high strength alloy steel commonly used for performance wrist pins where durability is needed for high cylinder pressure and rpm.

What does pin wall thickness change?

Wall thickness affects pin strength and weight. The correct choice depends on the piston design, rod, power level and engine builder recommendation.

Do I need chamfered piston pins?

Use the end treatment specified by the piston maker. Chamfered and non chamfered pins are not interchangeable without confirming clearance and design.

What are wire locks used for?

Wire locks retain a floating wrist pin inside the piston. Install the specified locks fully in the piston grooves.

Can I reuse piston pins?

Reuse only after careful inspection and measurement. A damaged, scored or out of tolerance pin should be replaced.

Can I mix different piston pin brands?

Use a pin approved for the piston and rod combination. Brand alone does not establish compatibility because dimensions and material can differ.

What should I measure before buying a pin?

Measure outside diameter, overall length, wall thickness, end treatment and the piston and rod interfaces.

Should a machine shop inspect the assembly?

Yes. A qualified engine builder or machine shop should inspect dimensions, clearances and lock seating for performance engine assemblies.

Why Buy Piston pins, wrist pins and wire locks from Black Ops Auto Works

Black Ops Auto Works stocks 27 performance focused SKUs with real fitment data, competitive pricing and support from staff who build these vehicles. Products are filterable by year, make, model, trim, engine and drivetrain to help confirm the correct application before ordering.

For focused shopping, browse Pistons, Forged 4 Cylinder Piston Sets, Forged 6 Cylinder Piston Sets, Forged 8 Cylinder Piston Sets, Diesel Piston Sets, Connecting Rods & Push Rods, Rod Bolt Kits, CP Pistons.