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SKU: 23001-AM005 | UPC: 4957266643037
HKS SMG-K Head Gasket 4G63 Evo 4-9 (1996-2006) t=1.6mm
HKS SMG-K head gasket provides reliable sealing for Mitsubishi 4G63 DOHC turbo engines in Lancer Evolution IV-IX models from 1996 to 2006. This 1.6mm thick multi-layer steel design withstands boost pressures over 30 psi and combustion temperatures up to 1000C in high-performance builds. It ensures consistent cylinder head contact for steady power in tuned applications.
Key Features
- Multi-Layer Steel Construction: Three 301 stainless steel layers with nitrile rubber elastomer coating deliver gas-tight seal under extreme boost exceeding 30 psi
- 1.6mm Thickness: Matches Evo deck heights for accurate quench area and fits heads milled up to 1.0mm without clearance issues
- 85mm Bore Size: Direct replacement for stock bores with support for oversize pistons to 87.5mm while keeping combustion seal rings effective
- High Temperature Resistance: Handles peak 1000C combustion temperatures without warping blowout or fatigue
- Direct Bolt-On Design: Matches OEM port shapes bolt holes and patterns for seamless install on Evo 4-9 4G63T engines
Product Notes
- Inspect head and block surfaces for flatness within 0.05mm prior to installation
- Pair with ARP head studs for boost levels over 25 psi
- Store in dry area away from oils to protect sealing beads
Installation Notes
- Professional installation recommended.
- Torque bolts in 3 stages to 80 Nm plus 90 degree turn following HKS pattern
- Requires M12x1.25 head studs fully compatible with Evo factory hardware
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| 1996-1998 | Mitsubishi | Lancer Evolution IV | GSR RS GT-A |
| 1998-1999 | Mitsubishi | Lancer Evolution V | GT-A RS GSR |
| 1999-2001 | Mitsubishi | Lancer Evolution VI | TME CP9A All |
| 2001-2003 | Mitsubishi | Lancer Evolution VII | CT9A GT-A RS MR |
| 2003-2005 | Mitsubishi | Lancer Evolution VIII | CT9A RS MR FQ |
| 2005-2006 | Mitsubishi | Lancer Evolution IX | CT9A RS MR FQ-360 |
Why Choose HKS?
- Proven in JGTC and D1GP racing with 4G63 engines
- Japanese factory direct production with ISO certified processes
- Tested for 50,000km durability in high boost track use
Frequently Asked Questions
-
Q: Will this gasket fit USDM Evo 8 and 9 models?
A: Yes it directly fits all 2003-2006 USDM Mitsubishi Lancer Evolution VIII and IX with 4G63T engines -
Q: What material composition is used?
A: Three layers of 301 stainless steel with nitrile rubber beads for pressure and heat sealing -
Q: Does installation require special tools?
A: Standard torque wrench and angle gauge suffice uses Evo OEM bolt pattern no machining needed for stock setups
Shipping & Handling
- Method: UPS Ground or USPS Priority
- Availability: In stock - ships same or next business day
- Packaging: Protective cardboard envelope 12 x 12 x 0.5 inches
- Weight: 0.44 lbs
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