HKS SMG/K 4G63(4-9) t=1.6 HKS HKS23001-AM005
HKS SMG/K 4G63(4-9) t=1.6 HKS HKS23001-AM005
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HKS SMG/K 4G63(4-9) t=1.6

HKS
HKS23001-AM005
4957266643037
Head Gaskets
3 Units In Stock - Ships Next Business Day
$ 350.00
FREE Ground Shipping!
$ 350.00

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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