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Wiseco K650M86 Pro Tru Sport Compact Forged Piston Set 86mm Bore

(2002-2006 Acura RSX Type-S)

Manufacturer

Picture for manufacturer Wiseco Pistons

Part Number

K650M86
13 reviews
Sale Price

$746.99

Estimated ship date Thursday, November 19

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Product Details

The Wiseco K650M86 is a Pro Tru Sport Compact Series forged piston set designed for high-performance Honda K-series engines. Built with an 86.00 mm bore, 30.00 mm compression height, and a 0.866 in. pin diameter, these pistons deliver the precision and durability demanded by serious engine builders. Each set includes 4 pistons, rings, and wrist pins — everything needed for a complete rebuild.

Key Features:

  • American-made forged construction — forged and CNC-machined by skilled craftsmen in Ohio using state-of-the-art equipment
  • Dedicated forgings — each piston is forged to match the final piston shape, resulting in a lighter and stronger piston compared to conventional designs
  • Plasma moly ring package included — pre-gapped 1/16", 1/16", 3/16" ring set for excellent combustion seal, reduced friction, and extended service life
  • Multiple compression ratio options — available in a range of dome volumes, allowing engine builders to dial in the exact compression ratio for their build
  • Multivalve-optimized crown design — features specially engineered valve pockets, complex dome and crown geometry, and optimized skirt profiles
  • Rings and wrist pins included — complete kit ready for installation
  • Recommended ring set: 8600XX

The Pro Tru Sport Compact line from Wiseco represents the best value in forged performance pistons, combining race-proven design with everyday affordability. Whether building for street performance or all-out competition, the K650M86 delivers the strength, consistency, and precision that Wiseco is known for worldwide.

Products specifications

Fits

2002-2006 Acura RSX Type-S

Bore

86mm

Comp Height

30

Comp Ratio

12.4:1

Dome Volume

10.5

Gram Weight

TBA

Rod

139

Stroke

86

A very satisfactory experience. The price I paid was the lowest I found on the internet for this product. Ordering was easy, and without hassle. My order was shipped promptly and arrived sooner than I expected. Order date to receipt was only 6 days

First of all, I can not believe how fast I recieved my order, 2 DAYS! Best of all, the instructions made it easy for a non mechanic like me to install.

Went well overall. I hope these fit my truck which are larger than the generic applications that fit 25 other vehicles except my truck. Every application I have received so far are about 2/3eds the size they should be for a truck application. Hope I won't

Good so far

easy to use and easy to pay

Prices were the best I was able to find for my part!!

Searching for parts and ordering was quick and easy. All parts were in stock.

very quick and easy.

so far so good

Found what I needed at a price that was better than any other I found in my online search. Ordering was easy. I will definitely access your website for products as I continue with my car build process.

Quick and easy

will wait till tires arrive to give full opinion

Product is great! Price is perfect! Shipping was slow.... Guess thats what i get for saving some money. Oh well! Ordered 3/25/12 and received 4/5/12 :(

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