What is the purpose of the -18cc dish in these pistons?

The -18cc dish is a specific design feature that reduces the volume of the combustion chamber. This is done to lower the overall compression ratio to 8.5:1, which is often beneficial for engines with forced induction like turbochargers or superchargers, or for specific camshaft profiles.

Are these pistons a direct replacement for my stock Saab engine?

Yes, these pistons feature a 91mm bore size, which is the stock dimension for many Saab engines. They are designed to be a direct fit for engine rebuilds, assuming standard connecting rods and crankshafts for that bore size are used.

What does 'Special Order' mean for these pistons?

Special order means these pistons are not a standard stock item and are manufactured specifically for your order. This ensures they meet precise specifications for custom engine builds but also means they may have a longer lead time and are typically non-returnable unless defective.

1999-2009 Saab 9-5 Custom Pistons | Wiseco KE184M91

Name: Wiseco Saab -18cc Dish 8.5CR (91mm) Custom Pistons SPECIAL ORDER
Brand: Wiseco
SKU: wiseco-wiseco-saab-18cc-dish-8-5cr-91mm-custom-pistons-special-order-t14-4385525
Price: 734.99 USD
Availability: BackOrder

Wiseco Saab -18cc Dish 8.5CR (91mm) Custom Pistons SPECIAL ORDER

$734.99

On Backorder

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

Fits 1999-2009 Saab 9-5. Wiseco custom pistons with a -18cc dish for an 8.5:1 compression ratio.

Key Features

Fits 1999-2009 Saab 9-5 and 1999-2002 Saab 9-3.
Features a -18cc dish volume for a targeted 8.5:1 compression ratio.
Built with a 91mm bore size, matching the stock dimension for easy installation.
Constructed from forged aluminum alloy for improved strength and durability over cast pistons.
Precisely machined dish ensures consistent combustion chamber volume for balanced performance.
Designed for engine builds requiring lower compression, often for forced induction.

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Product Details

Starting with a -18cc dish volume, these Wiseco custom pistons are built to achieve a specific 8.5:1 compression ratio for your Saab 9-5. This particular setup is designed for engine builds where a lower compression is desired, often for forced induction applications or to accommodate specific camshaft profiles. The 91mm bore size is a direct replacement for the stock dimension, making installation straightforward for a rebuild.

Wiseco is well-known for its forged pistons, and this set is no different. Forging the aluminum alloy creates a stronger, more durable piston than cast alternatives. This means they can better withstand the increased cylinder pressures and temperatures that come with performance engine work. The -18cc dish is precisely machined into the piston crown, ensuring consistent combustion chamber volume across all cylinders for balanced engine performance. These are a special order item, meaning they are made to meet specific engine building needs rather than being a general off-the-shelf part.

Because these are custom-ordered pistons, it's important to confirm they align with your overall engine build strategy, especially if you're planning on turbocharging or supercharging your 1999-2009 Saab 9-5. They are designed to work with standard connecting rods and crankshafts for the specified bore size, but always double-check your connecting rod journal size and piston pin diameter to ensure a perfect match during your engine assembly. Remember, these pistons are not CARB approved and cannot be shipped to California.