Fluidampr GM/Chevy LS Drill Pin Kit - 300004

The Fluidampr GM/Chevy LS Drill Pin Kit (Part Number 300004) is Fluidampr's purpose-built solution for properly securing a harmonic damper to the crankshaft on GM/Chevy LS engines. Designed at the request of professional race engine builders and performance enthusiasts, this kit addresses one of the most overlooked risks in high-performance LS builds: damper slippage under extreme load. Whether you're building a track car, a drag machine, or a high-boost street engine, pinning your damper is a step serious engine builders don't skip.

Key Features & Benefits

• Prevents Damper Slippage: Fluidampr specifically recommends pinning the damper to the crankshaft on GM/Chevy LS engines for high-performance applications. Slippage can cause timing errors, damper damage, and catastrophic engine failure — this kit eliminates that risk.
• Face-Mount Pin Design: The pins mount through the face of the crankshaft, as opposed to drilling into the top of the crankshaft common to other aftermarket pin kits. Fluidampr's approach is engineered for optimum holding force and reduced risk of crankshaft stress concentration.
• Laser-Engraved Drill Guide: The included Fluidampr laser-engraved drill guide ensures accurate hole placement every time, minimizing the chance of drilling errors during installation — a critical concern when working on an assembled or semi-assembled engine.
• HSS Drill Bit Included: A 1/4" High Speed Steel (HSS) drill bit is included so you have the correct tooling matched to the dowel pin diameter right out of the box. No separate tool sourcing required.
• Solid Steel Dowel Pins: Two solid 1/4" x 7/8" press-fit steel dowel pins are included — hardwearing and sized to provide a secure, interference fit in the drilled crankshaft holes.
• Heat-Treated Hold-Down Bolt: A heat-treated hold-down bolt is part of the kit to keep the drill fixture accurately aligned during the drilling process, helping ensure the guide doesn't walk or shift.
• Works with All LS Engines: Fluidampr designed this kit to be compatible with the full family of GM/Chevy LS engines, making it a universal solution for LS-based performance builds.
• Everything in One Kit: Rather than hunting down individual components, builders get drill guide, drill bit, dowel pins, and holding bolt in a single part number — saving time and eliminating guesswork.

Specifications

• Part Number: 300004
• Brand: Fluidampr
• Dowel Pin Size: 1/4" diameter x 7/8" length (solid, press-fit steel)
• Quantity of Dowel Pins: 2
• Drill Bit Size: 1/4" HSS (High Speed Steel)
• Drill Guide: Laser-engraved Fluidampr drill fixture
• Hold-Down Bolt: Heat-treated, included for fixture alignment
• Application: GM/Chevy LS engines (all LS)
• Pin Mount Location: Through the face of the crankshaft

Fitment

The Fluidampr LS Drill Pin Kit 300004 is designed to work with all GM/Chevy LS engines. This broad compatibility makes it the go-to solution for LS1, LS2, LS3, LS6, LS7, LS9, LSA, and other LS-family engine platforms used across Chevrolet Camaro, Corvette, Cadillac CTS-V, and a wide range of LS-swapped vehicles and racing applications. Fluidampr specifically recommends this kit when installing their performance dampers on LS engines in high-performance or racing use cases. If you are unsure whether this kit is correct for your specific engine or build, contact ThreePiece.us for fitment assistance before ordering.

What's in the Box

• 2x solid 1/4" x 7/8" press-fit steel dowel pins
• 1x 1/4" HSS drill bit
• 1x Fluidampr laser-engraved drill guide/fixture
• 1x heat-treated hold-down bolt

Why Buy from ThreePiece.us

At ThreePiece.us, we stock performance parts for serious builders — not casual browsers. When you order the Fluidampr LS Drill Pin Kit from us, you get free shipping on every order, no minimum required. Need to spread the cost of your build across multiple payments? We offer financing through Affirm, so you can get the parts you need now and pay over time. Have a fitment question or need help confirming this kit works for your specific LS build? Our team is here to help — reach out before or after your order and we'll make sure you get the right parts the first time.

Frequently Asked Questions

Q: Does this kit work with all LS engines, or only specific variants?

A: According to Fluidampr, the LS Pin Kit P/N 300004 works with all LS engines. It is not limited to a specific displacement or generation within the LS family.

Q: Why does Fluidampr recommend pinning the damper on LS engines?

A: Fluidampr specifically states that properly securing the damper with pin(s) in LS engine performance applications is highly recommended to prevent slippage and potential damage. Under high-performance conditions, the clamping force of the crankshaft bolt alone may not be sufficient to prevent the damper from rotating on the snout.

Q: How is this kit different from other aftermarket LS pin kits?

A: Fluidampr's design pins through the face of the crankshaft rather than drilling into the top of the crankshaft, which is the approach used by some other aftermarket pin kits. Fluidampr states their face-mount method provides optimum holding. The kit also includes a laser-engraved drill guide and a heat-treated hold-down bolt for accurate, repeatable drilling.

Q: What exactly comes in the kit — do I need to buy any additional hardware or tools?

A: The kit includes two solid 1/4" x 7/8" press-fit steel dowel pins, a 1/4" HSS drill bit, a Fluidampr laser-engraved drill guide, and a heat-treated hold-down bolt. These components are everything needed for the drilling and pinning procedure as described by Fluidampr.