What is the compression ratio of these pistons and why does it matter for a boosted engine?

These pistons have a compression ratio of 8.5:1. This lower compression ratio is beneficial for turbocharged or supercharged (boosted) engines because it helps prevent detonation or 'knocking' under high pressure, allowing for more aggressive tuning and increased power output.

What is included in this piston set?

This is a complete set of four pistons, designed to replace all the pistons in your SR20DET engine. It includes the pistons themselves, ready for installation by a professional engine builder.

Are these pistons compatible with all SR20DET engines?

This specific piston set is verified to fit the 1989-1998 Nissan 240SX SR20DET engine. While the SR20DET was used in other applications, it's important to confirm the exact bore size and pin diameter for your specific engine variant before purchasing.

1989-1998 Nissan 240SX Forged Piston Set

Name: JE Pistons NISN SR20DET 8.5 KIT Set of 4 Pistons
Brand: JE Pistons
SKU: je-pistons-je-pistons-nisn-sr20det-8-5-kit-set-of-4-pistons-t14-295586
Price: 899.99 USD
Availability: BackOrder

JE Pistons NISN SR20DET 8.5 KIT Set of 4 Pistons

$899.99

On Backorder

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

Fits 1989-1998 Nissan 240SX. JE Pistons NISN SR20DET 8.5 KIT Set of 4 Pistons. Boost your engine's performance and durability.

Key Features

Fits 1989-1998 Nissan 240SX.
Forged from 2618-T61 aluminum alloy for improved strength and durability.
Features an 8.5:1 compression ratio, ideal for boosted SR20DET engines.
Includes lateral gas relief and accumulator grooves for better oil control and efficiency.
Set of 4 pistons designed as a direct replacement for stock units.
Precision-machined for a precise fit and optimal engine performance.

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Product Details

Forged from 2618-T61 aluminum alloy, these JE Pistons are built to handle the demands of a performance-tuned SR20DET engine in your 1989-1998 Nissan 240SX. The 8.5:1 compression ratio is a solid choice for boosted applications, offering a good balance between power and reliability when paired with appropriate tuning. JE Pistons has been a trusted name in high-performance engine components for decades, and this set is no exception, offering a well-built foundation for your engine build.

This kit includes a complete set of four pistons, designed to be a direct replacement for your stock units, but with significantly improved strength and durability. The 2618-T61 aluminum alloy is known for its excellent fatigue resistance and ability to withstand high temperatures and pressures, making it ideal for performance engines that see hard use. JE Pistons also includes features like lateral gas relief and accumulator grooves, which help manage oil flow and reduce blow-by, contributing to a more efficient and powerful combustion process. These pistons are precision-machined to ensure a perfect fit and optimal performance within the SR20DET cylinder bore.

When rebuilding or upgrading your SR20DET, choosing quality internal components is crucial. This set of JE Pistons provides the strength and reliability needed to push your engine's performance envelope. Please note that these pistons are not CARB approved and cannot be shipped to California. Always consult your engine builder or a qualified mechanic for specific installation recommendations and tuning advice to get the most out of these high-performance pistons.