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Supertech Ford Duratec 2.5L 91mm Bore .040in (1.00mm) Thick MLS Head Gasket Supertech SPTHG-FDUR25-91-1T
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Supertech Ford Duratec 2.5L 91mm Bore .040in (1.00mm) Thick MLS Head Gasket

Supertech
SPTHG-FDUR25-91-1T
01037721243524
Head Gaskets
5 Units In Stock - Ships Next Business Day
$ 161.48 $ 129.22
$ 129.22

SKU: HG-FDUR25-91-1T | UPC: 01037721243524

Supertech Ford Duratec 2.5L 91mm Bore .040in (1.00mm) Thick MLS Head Gasket 2005-2011 Ford Focus 2004-2009 Mazda3 Mazda6

This Supertech MLS head gasket provides reliable sealing for Ford Duratec 2.5L engines with 91mm bores in high performance builds. It fits 2005-2011 Ford Focus 2004-2009 Mazda3 Mazda6 2006-2012 Fusion and 2007-2013 Volvo C30 S40 V50 models with modified Duratec engines. The 0.040in thickness enables tight quench areas to increase combustion efficiency and power under high boost.

Key Features

  • MLS Construction: Multi-layer steel design with embossed sealing beads handles pressures over 40 psi boost and high cylinder pressures without blowout
  • 91mm Bore Diameter: Precision matched to oversized Duratec bores ensuring zero leaks around combustion chamber for maximum power retention
  • 0.040in (1.00mm) Thickness: Reduced gasket thickness promotes shorter quench distance boosting detonation resistance and horsepower
  • High Temperature Resistance: Fire ring and stainless steel layers endure 2000F temps in turbocharged or supercharged Duratec builds
  • Direct OEM Replacement: Matches factory bolt pattern for seamless install on ported heads or stock configurations

Product Notes

  • Measure bore size prior to installation to confirm 91mm compatibility
  • Replace head bolts or use ARP studs for repeated disassembly
  • Packaged flat in protective envelope for damage-free delivery

Installation Notes

  • Professional installation recommended.
  • Clean cylinder head and block surfaces to mirror finish before assembly
  • Compatible with OEM head bolts torqued to Ford Duratec specs in crisscross pattern

This Part Fits

Year Make Model Submodel
2005-2011 Ford Focus All (2.0L 2.3L Duratec bored to 2.5L)
2004-2009 Mazda 3 All (2.3L Duratec bored to 2.5L)
2003-2008 Mazda 6 All (2.3L Duratec bored to 2.5L)
2006-2012 Ford Fusion 2.5L Duratec
2007-2013 Volvo C30 S40 V50 2.5L Duratec

Why Choose Supertech?

  • Performance parts trusted in World Challenge racing series
  • CNC machined for exact tolerances on every gasket
  • Engineered for boosted Duratec engines in drag and circuit use

Frequently Asked Questions

  • Q: Will this gasket fit stock bore Duratec engines?
    A: Designed specifically for 91mm bores use stock gaskets for 87-89mm applications
  • Q: What materials are used in construction?
    A: Three-layer 301 stainless steel with elastomer-coated center and wire-arc fire ring for sealing
  • Q: What warranty coverage applies?
    A: One-year unlimited mileage defect warranty covers manufacturing flaws when installed correctly

Shipping &amp. Handling

  • Method: UPS Ground or USPS Priority
  • Availability: In stock - ships same or next business day
  • Packaging: Flat envelope 12in x 10in x 0.25in
  • Weight: 0.45 lbs

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