What is the main advantage of a forged piston over a cast piston?

Forged pistons are made by heating and hammering a block of aluminum, which aligns the grain structure and makes them much stronger and more resistant to heat and pressure than cast pistons. This improved durability is ideal for performance applications or heavy-duty use.

Does this piston come with rings, pins, or clips?

This product listing is for the single piston only. Rings, pins, and clips are typically sold separately and may need to be purchased to complete the installation.

Can this piston be shipped to California?

No, this piston is not CARB approved and cannot be shipped to California due to emissions regulations.

JE Pistons Forged Piston 379166S - Honda TRX 400EX

Name: JE Pistons 99-08 Honda TRX 400EX - 85MM/12.0 to 1 Piston Single
Brand: JE Pistons
SKU: je-pistons-je-pistons-99-08-honda-trx-400ex-85mm-12-0-to-1-piston-single-t14-695816
Price: 269.99 USD
Availability: BackOrder

JE Pistons 99-08 Honda TRX 400EX - 85MM/12.0 to 1 Piston Single

$269.99

On Backorder

Order now to reserve yours — we'll ship as soon as stock arrives. Full refund if we're unable to fulfill.

JE Pistons forged piston for 99-08 Honda TRX 400EX. 85MM bore, 12.0:1 compression ratio.

Key Features

Fits 1999-2008 Honda TRX 400EX.
Forged aluminum construction for improved strength and durability.
85mm bore size.
12.0 to 1 compression ratio for increased performance potential.
Sold individually for targeted replacement or full engine builds.
JE Pistons part number 379166S.

This piston is designed for the 1999-2008 Honda TRX 400EX. Please verify fitment for your specific model year.

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Product Details

JE Pistons is well-known for making strong engine components, and this forged piston is a prime example of their work. This single piston is built for the 1999-2008 Honda TRX 400EX, designed to replace a worn or damaged original part and bring your ATV's engine back to life. It features an 85mm bore and a 12.0 to 1 compression ratio, which is a step up from stock and can help improve performance when paired with the right setup.

Forged pistons like this one are made from a solid block of aluminum that's heated and hammered into shape, making them significantly stronger and more durable than cast pistons. This means they can handle higher cylinder pressures and temperatures, which is important if you're looking to get more out of your engine. The 12.0 to 1 compression ratio is a notable increase, so you'll want to make sure your engine's fuel and ignition systems are set up to take advantage of it for optimal results. This piston is sold individually, so you can replace just the one you need or buy a set for a full engine rebuild.