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Wiseco Flat Top Piston Kit – Acura K20 / K24 | 87.5mm Forged Shelf Stock
Built for Boost, N/A, or High RPM – Wiseco Delivers Precision & Power
The Wiseco Flat Top Piston Kit (1.181" x 87.5mm) is the top-tier upgrade for Honda/Acura K20 and K24 engines looking for high-compression, race-grade reliability and lightweight forged performance. Whether you’re building a naturally aspirated K-series screamer or prepping for turbocharged torque, Wiseco’s proven shelf-stock pistons are ready to handle high cylinder pressures, detonation resistance, and extended abuse — right out of the box.
Forged from 2618 alloy aluminum with precision-machined skirts, these pistons offer reduced weight, faster acceleration, and superior thermal control under high-stress conditions. Trusted by pro engine builders, Wiseco pistons deliver real results on dynos, drag strips, and road courses alike.
Key Features & Benefits
- ✅ 87.5mm bore – perfect for overbore or sleeved builds
- ✅ Flat top design for optimal compression in performance K20/K24 setups
- ✅ Forged 2618 aerospace-grade aluminum for strength & durability
- ✅ Machined valve reliefs and skirt coating for reduced friction & noise
- ✅ 1.181” compression height for compatibility with various rod/stroke combos
- ✅ Designed for naturally aspirated or boosted (turbo/supercharged) builds
- ✅ Shelf-stock convenience with race-level engineering
✅ Vehicle & Engine Compatibility
- Acura RSX Type S – K20A2, K20Z1
- Honda Civic Si (EP3, FG2) – K20A3, K20Z3
- Acura TSX, Honda Accord – K24A2, K24A4
- Swapped K-series into EG, EK, DC2 chassis
- K20/K24 Frankenstein hybrid builds
Note: Verify deck clearance and compression ratio based on head, gasket, and rod selection.
Ideal For:
- ✔️ All-motor high compression builds
- ✔️ Turbocharged and supercharged K20/K24 applications
- ✔️ Track, time attack, drag, and aggressive street builds
- ✔️ Racers and tuners needing proven forged internals
Technical Specifications
- Bore: 87.5mm
- Compression Height: 1.181”
- Piston Type: Flat Top with valve reliefs
- Material: 2618 Forged Aluminum
- Weight: Lightweight for high-revving response
- Includes: Pistons, wrist pins, pin locks, piston rings
Installation Notes
- Use proper ring gap based on boost or N/A application
- Check piston-to-wall clearance per Wiseco specs
- Ideal with forged rods and ARP head studs for reliability
Frequently Asked Questions
Will this work with a K20/K24 hybrid build?
Yes. With the correct rod and crank combo, these pistons are ideal for hybrid K builds.
What compression ratio will I get?
It depends on your chamber volume and gasket thickness, but flat tops generally provide 11.5:1+ with K20 heads.
Are these safe for turbo use?
Absolutely. Wiseco 2618 forged pistons are widely used in 500+whp turbo K builds.
Build your K20/K24 the right way with Wiseco’s proven flat top piston kit – forged strength, race performance, and ready for serious power.
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