fits model: Rsx, Civic.

( Brand: Wiseco ), ( Manufacturer Part Number: K631M86 ), ( Part Type: Piston )
The K20Z3 9.5mm, K20Z1 86mm, K20A2 RSX, K20A, and K631M86 Civic pistons from Wisco are engine components designed to deliver superior performance and reliability. These forged pistons are crafted from high-strength 2618-T6 aluminum alloy, ensuring superior strength and durability.
The K20Z3 9.5mm pistons are specifically designed for high-compression applications, providing increased horsepower and torque without sacrificing engine longevity. The K20Z1 86mm pistons offer a balanced performance for standard and moderate power builds, while the K20A2 RSX pistons are tailored for the high-performance RSX platform.
The K20A pistons are a great fit for daily drivers and mild performance upgrades, while the K631M86 Civic pistons are specifically designed for the 2002-2005 Civic SI. Each piston set includes Wisco's proprietary RingPack ring package, which includes a top ring, second ring, and oil control ring, ensuring optimal sealing and minimum ring groove wear.
The pistons also feature Wisco's patented dry-film lubricant coating on the skirt, wrist pin, and ring grooves, reducing friction and promoting longer engine life. Additionally, the pistons have a full-floating wrist pin, which eliminates pin bore distortion and minimizes wrist pin play.
In summary, these Wisco K20Z3 9.5mm, K20Z1 86mm, K20A2 RSX, K20A, and K631M86 Civic pistons are high-quality, forged engine components designed to deliver superior performance and reliability for various K-series applications. Whether you're looking for pistons for a daily driver, a mild performance upgrade, or a high-compression build, Wisco has a piston set that will meet your needs.
Pros of K20Z3 9.5 pistons:1. Enhanced power output: K20Z3 9.5 pistons can provide a significant increase in horsepower and torque compared to stock pistons.
2. Durability: They are made of high-quality materials, such as forged aluminum, which can withstand high compression ratios and high-performance applications.
3. Improved engine response: The larger displacement of K20Z3 9.5 pistons can lead to improved engine response and throttle response.
Cons of K20Z3 9.5 pistons:1. Cost: K20Z3 9.5 pistons are more expensive than stock pistons.
2. Engine modifications required: To install K20Z3 9.5 pistons, you may need to make other engine modifications, such as a higher compression head gasket, camshaft, and intake/exhaust modifications.
3. Risk of engine damage: If not installed correctly or if the engine is not properly tuned, K20Z3 9.5 pistons can lead to engine damage, such as detonation, piston ring failure, or engine overheating.
Pros of K20Z1 86mm pistons:1. Increased power: K20Z1 86mm pistons can provide an increase in horsepower and torque compared to stock pistons.
2. Better engine breathing: Larger pistons can improve engine breathing, which can lead to better fuel efficiency and engine performance.
3. Durability: Like K20Z3 pistons, K20Z1 86mm pistons are made of high-quality materials and can withstand high-performance applications.
Cons of K20Z1 86mm pistons:1. Engine modifications required: To install K20Z1 86mm pistons, you may need to make other engine modifications, such as a higher compression head gasket, camshaft, and intake/exhaust modifications.
2. Cost: K20Z1 86mm pistons are more expensive than stock pistons.
3. Risk of engine damage: If not installed correctly or if the engine is not properly tuned, K20Z1 86mm pistons can lead to engine damage, such as detonation, piston ring failure, or engine overheating.
Pros of K20A2 RSX pistons:1. Improved performance: K20A2 RSX pistons can provide an increase in horsepower and torque compared to stock pistons.
2. Durability: They are made of high-quality materials, such as forged aluminum, which can withstand high compression ratios and high-performance applications.
3. Better engine breathing: Larger pistons can improve engine breathing, which can lead to better fuel efficiency and engine performance.
Cons of K20A2 RSX pistons:1. Engine modifications required: To install K20A2 RSX pistons, you may need to make other engine modifications, such as a higher compression head gasket, camshaft, and intake/exhaust modifications.
2. Cost: K20A2 RSX pistons are more expensive than stock pistons.
3. Risk of engine damage: If not installed correctly or if the engine is not properly tuned, K20A2 RSX pistons can lead to engine damage, such as detonation, piston ring failure, or engine overheating.
Pros of K20A pistons:1. Affordable: Compared to other options, K20A pistons are more affordable.
2. Improved performance: K20A pistons can provide an increase in horsepower and torque compared to stock pistons.
Cons of K20A pistons:1. Durability concerns: K20A pistons may not be as durable as forged pistons, which can lead to premature failure in high-performance applications.
2. Engine modifications required: To install K20A pistons, you may need to make other engine modifications, such as a higher compression head gasket, camshaft, and intake/exhaust modifications.
3. Limited power gain: While K20A pistons can provide an increase in horsepower and torque, they may not provide as much power gain as other options, such as K20Z3 or K20Z1 pistons.
Conclusion and recommendation:If you are looking for significant power gains and durability in a high-performance application, K20Z3 9.5 pistons or K20Z1 86mm pistons may be the best option for you. However, they are more expensive and require more engine modifications than K20A pistons. If you are on a budget or looking for a more affordable option, K20A pistons may be a good choice for you. Regardless of which option you choose, it is important to have your engine properly tuned and installed by a professional to avoid engine damage.
Some of our sport compact pistons are even matched with high quality NPR steel nitrated rings with Napier 2nd rings.
More fuel and air equals more horsepower. Please see the for information regarding shipping costs and available shipping methods. Optimized skirt profiles minimize rock and provide long skirt life in striker applications.
Our Wiseco domestic auto and sport compact pistons are top of the line performance parts, built for the demanding consumer that wants nothing but the best. Made in the USA Wiseco domestic auto and sport compact pistons are forged and machined in house and receive a full compliment of power enhancing features.
Valve pocket designs allow maximum flow around the valve, allowing the use of oversized valves and high lift cams. 4cc dish grams Wiseco pistons have proven themselves in a variety of motor sports applications from mild 150 horsepower street engines to horsepower race cars.
The end product is longer engine life and increased horsepower potential.
Piston crown shapes are designed to promote the maximum intake charge efficiency through a scavenging mixture cross flow during intake and exhaust valve overlap.
Please see the part number and for specifics. Piston domes are designed for optimal quench during the compression combustion cycle, resulting in resistance to detonation and pre ignition.
5/1 K631M86 images are generic stock photos. Search by make model year or part number Wiseco pistons Rsx Civic k20 k20a K20A2 K20Z1 K20Z3 86mm bore 9.
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