Home

Help

Testimonials

New Arrivals

View Cart

Install Tips

Categories

Bestsellers

1. K&N High Flow Panel Air Filter - EVO X / Ralliart / GTS
2. AEM Cold Air Intake Gun Metal Gray - Lancer Ralliart 2009+
3. AEM Universal Dry Flow Air Filter
4. Ultimate Racing Short Ram Air Intake - Lancer Ralliart 2009+
5. WORKS High-Flow Drop-In Air Filter - EVO X / Ralliart / Lancer
6. Injen Tuned Short Ram Intake System w/ MR Tech 2009-2011 Mitsubishi Lancer Ralliart
7. K&N Air Filter Cleaning Kit
8. Injen High Performance Air Filter - 4.5" Black Filter
9. Injen Cold Air Intake 2009-2011 Mitsubishi Lancer Ralliart (Will not fit vehicles with fog lights)
10. AEM 4.5 IN Short Neck 5IN Element Filter Replacement - Universal

Testimonials

I called turboxs, sold out, i called Andys Autosport, sold out. I called lancershop.com and they were helpful and got me fixed. Awesome customer service and super fast shipping. I will buy everything i need from them from now on.

M.Murphy

View All Testimonials

Write Your Own Testimonial

Wiseco Asymmetric Skirt Bore 86.75mm - Size +.070 - CR 9.5 Piston Set - EVO 8/9

Product Description

Wiseco's new asymmetrical piston forging design for the Mitsubishi Lancer Evolution 8-9 maintains a larger skirt area on the heavily stressed major thrust side, while reducing friction with a smaller skirt area on the minor thrust side. The result is a high strength, lightweight piston that significantly reduces friction in your engine.

What is asymmetrical?

Asymmetrical, by definition, means "not symmetrical". The new asymmetrical forged pistons from Wiseco utilize two different sized piston skirts, so are identified as an "asymmetrical" piston design.

Why are asymmetrical pistons better?

FACT: The two skirts of a piston do not experience the same amount of mechanical loading. During the firing cycle, the load exerted on one piston skirt, referred to as the "major thrust side," can be up to 10 times higher than the load experienced by the opposing skirt, referred to as the "minor thrust side." The disparity in skirt loading can vary in magnitude depending on key variables including the engine's stroke, rod length, and peak cylinder pressure.

Wiseco's asymmetrical pistons are designed to specifically handle the dissimilar mechanical loads experienced by both piston skirts. The resulting piston design features a large skirt area on the heavily loaded "major thrust side" and a small skirt area on the less loaded "minor thrust side". Overall, the piston design is stronger, yet lighter than previous designs.

The Wiseco asymmetrical Evo "shelf" pistons are available in a variety of compression ratios, bore diameters to suit a broad range of combinations.

Part# K666M8675AP

Details

Price: $662.95

Purchase Product

Qty

If you see this message, your web browser doesn't support JavaScript or JavaScript is disabled. Please enable JavaScript in your browser settings so the online store can function correctly.