What “1400HD” Means
Wiseco’s 1400HD series is built for:
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High horsepower turbo builds
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Extreme cylinder pressure
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Drag and roll racing setups
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Aggressive boost applications
These are forged pistons built to handle serious abuse.
Product Overview:
– Wiseco Sport Compact Piston And Ring Kits Give You Stronger Pistons And Tighter Tolerances Than Any Other Part In Your Engine, With Less Internal And External Machining. Wiseco’s Advanced Forging Process And Extensive Heat-Treating And Finishing Processes Ensure The Performance And Reliability That You Demand From Your Engine. These Kits’ Crown Thickness And Ring Lands Are Designed For Power-Adders Like Turbos And Blowers And Nitrous Oxide.
Key Specifications
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Part Number: K627M87AP
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Engine: 4G63 Turbo
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Application: Evo 8
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Dish Volume: -21cc
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Forged aluminum construction
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Designed for high-performance builds
⚠️ Always verify bore size and compression goals before ordering.
Product Info:
– Wiseco 1400 Hd Mitsu Evo 8 – 4G63 Turbo -21Cc Piston Shelf Stock Kit
Manufacturer Part Number:
– Part Number: K627m87ap
Product Specifications:
– Sold As A Kit.
– Piston Rings Included: Yes
– Bore (Inch): 3.425 Inch
– Bore (Mm): 87.000Mm
– Stroke: 3.937 Inch
– Rod Length: 5.906 Inch
– Piston Style: Dish, With Four Valve Reliefs
– Piston Material: Forged Aluminum
– Compression Height (Inch): 1.130 Inch
– Piston Head Volume (Cc): +21.00Cc
– Wrist Pin Style: Press-Fit Or Floating
– Wrist Pin Retainers Included: Yes
– Wrist Pin Included: Yes
– Pin Diameter (Inch): 0.866 Inch
– File Fit: Yes
– Top Ring Thickness: 1.0Mm
– Top Ring Material: Steel
– Top Ring Facing Material: Gas Nitrided
– Second Ring Thickness: 1.2Mm
– Second Ring Material: Cast Iron
– Second Ring Facing Material: Phosphate Coated
– Oil Ring Thickness: 2.8Mm
– Oil Ring Material: Stainless Steel
– Oil Ring Tension: Standard
– Notes: Fits 4G63 Engines, Second Generation 7-Bolt With 100Mm Stroker Crankshaft. Pistons Include .225 Inch Wall Tool Steel Pins.
Why Forged Pistons Matter
Compared to cast pistons, forged pistons offer:
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Greater strength under boost
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Improved heat resistance
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Better detonation tolerance
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Higher RPM durability
On a 4G63 turbo build, forged internals are foundational.
Important information
Legal Disclaimer
This product is an aftermarket product. It is not OEM and is neither manufactured nor sold by the vehicle manufacturer listed. We are not affiliated with the vehicle manufacturer.
Ideal Applications
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Built 4G63 drag setups
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High-boost street builds
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Big turbo upgrades
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E85 or race fuel applications
Pair with forged rods and ARP hardware for a complete bottom-end solution.
Installation Notes
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Measure cylinder bores precisely
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Check piston-to-wall clearance
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Balance rotating assembly
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Verify ring gap for boost level
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Follow proper break-in procedure
Because piston clearance is not “close enough” territory.
Final Verdict
The Wiseco 1400HD Piston Kit (K627M87AP) for Evo 8 4G63 is a serious upgrade for high-horsepower turbo builds. Forged strength, proper dish design, and built to withstand extreme boost.
Because if you’re building it once, build it strong.
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