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Description
Wiseco K634M865 Piston Kit - K24 w/ K20 Cylinder Head +5cc (12.5:1 Compression)Wiseco K634M865 Piston Kit Honda K24 w K20 Cylinder Head +5cc (Comp Ratio 12. 5: 1) Acura Honda K20 RSX S 2002 2006 Always check piston to valve clearance If using VTEC or like mechanisms check with longer duration higher lift lobe Always run at least . 030" piston to head clearance including gasket thickness If piston appears to be different than expected call to verify compatibility Also applicable to Acura Honda K24 & K24 (w K20 Cylinder Head) Most
Wiseco K634M865 Piston Kit - Honda K24 w/ K20 Cylinder Head +5cc (Comp Ratio 12.5:1)Acura / Honda K20 RSX-S 2002-2006
Always check piston to valve clearance
If using VTEC or like mechanisms - check with longer duration higher lift lobe
Always run at least .030" piston to head clearance including gasket thickness
If piston appears to be different than expected call to verify compatibility
Also applicable to Acura / Honda K24 & K24 (w/ K20 Cylinder Head)
Most Wiseco Pistons have an offset pin. Pins must be offset same as OEM for quietest operation. Optional pin upgrade available.
Product Specifications:
Bore Size: 86.50 / 3.405
Oversizes: .020
Stroke: 3.286 / 86
Rod Length: 5.472 / 139
Comp Height: 1.181 / 30
Head cc's: 50.5
Dome Dish: 5
Gasket Thickness: 0.025 / 0.630
Deck Clearance: 0.001- / 0.025-
Block Height: 8.347 / 212
Comp Ratio: 11.08
Pins (included): S618 (22mm)
Ring (included): 8650XX
Wiseco Pistons - Sport Compact Series: Wiseco is world renowned for their work building race winning pistons for compact engines featuring small bores multi-valves and high RPM applications for many years. Wiseco utilizes experience acquired from a diverse background of the most sophisticated engines in such venues as Formula 1 Indy Car Racing NHRA Pro Stock Bike AMA Superbike and AMA Motocross to design and manufacture the highest technology Sport Compact piston available.
Generous Valve Pocket designs that allow maximum flow around valve. Note: Piston to
valve clearance must be checked.
Piston Crown shapes designed to promote maximum Intake Charge efficiency thru
scavenging mixture “Cross Flow" during intake and exhaust valve overlap.
Pistons designed to optimize squish or quench during compression combustion cycle
event resulting in resistance to detonation and pre-ignition.
Complex Piston skirt profiles that reduce power robbing friction yet promote stability in
bore for optimum ring seal.
Precision machined ring grooves with proper orifice / accumulator volume using calculated
groove root diameters and axial widths featuring excellent surface finish and flatness
providing maximum ring seal and minimizes blow-by and oil consumption.
World class forging facility that utilizes the latest technologies featuring complex forged
shapes advanced materials and featured-aligned grain flow technology.
Piston weights listed may vary. All specs based on U.S. engine codes unless noted.
All Sport Compact pistons sold complete with rings pins and clips.
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.5 ★★★★★
Based on 8 reviews
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Product Reviews
★★★★★ 4
Perfect for Teething Puppies and Adult Dogs and Keeps Them Busy
Color: Pacifier, Size: Small, Color: Pacifier, Size: Small
The Nylabone Puppy Pacifier Chew Toy has been a lifesaver during my puppy’s teething stage and AFTER.
Quality: The material is sturdy yet gentle enough for developing puppy teeth. After weeks of daily use, it shows normal wear. The pacifier shape makes it easy for small mouths to grip and carry around.
Effectiveness: It’s great for soothing sore gums and redirecting chewing behavior. I’ve noticed my puppy is calmer after chewing on it for a while.
Helpfulness Tip: Supervise during chewing sessions and wash it occasionally with warm soapy water to keep it clean.
If you have a small-breed puppy under 25 lbs, this toy is a safe, durable, and fun way to help with teething.
Bought twice, they love these. Miniature dachshund and French bulldog
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on August 13, 2025
★★★★★ 5
Wonderful purchase
Color: Pacifier, Size: Small
Wonderful purchase for my puppy during gnawing phase.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 25, 2026
★★★★★ 5
Nice chew toy
Color: Dinosaur, Size: Small
I have a small dog that loves chewing on these. It’s a bit pricey, but it helps keep her teeth clean, so I will pay this over her needing tooth extractions and a vet bill.
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Reviewed in the United States on May 26, 2026
★★★★★ 3
Not chew proof for little puppies
Color: Rings, Size: Small
Our first Chihuahua when she was a puppy loved chewing on this and pieces never came off. Our second Chihuahua I guess was a heavier tour and he was able to get pieces flaked off.
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Reviewed in the United States on January 24, 2026
★★★★★ 5
Great for teething puppy
Color: Pacifier, Size: Small
I was trying to find something very sturdy for our puppy that she could not bite pieces off of and this toy has been great. She loves it and it has held up very nicely. They are not soft so it is great for our teething pup. They are also the perfect size if you have a bigger pup like we do. She is a 4 month old pit mix. I would say they would be too big for a small breed puppy
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Reviewed in the United States on June 8, 2026