-19%
Supertech Ford Duratec 2.5L 91mm Bore .040in (1.00mm) Thick MLS Head Gasket Supertech SPTHG-FDUR25-91-1T
Click to zoom in

Supertech Ford Duratec 2.5L 91mm Bore .040in (1.00mm) Thick MLS Head Gasket

Supertech
SPTHG-FDUR25-91-1T
01037721243524
Head Gaskets
4 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

Request For Information

Have questions about Supertech Ford Duratec 2.5L 91mm Bore .040in (1.00mm) Thick MLS Head Gasket? Fill out the form below and we'll get back to you by the next business day.
Engine

Engine

Engine parts and engine bay upgrades for Dodge, Jeep, RAM, Chrysler, Chevrolet, Ford, Toyota, Nissan, Subaru, and Honda vehicles are stocked at Black Ops Auto Works. Shop oil catch cans, supercharger pulleys, thermostats, radiators, cooling parts, throttle bodies, intake manifolds, headers, ignition coils, spark plugs, sensors, gaskets, fuel pumps, valve covers, engine covers, billet cap covers, and full engine bay dress-up parts for HEMI, Hellcat, Trackhawk, Redeye, Demon, Scat Pack, RAM TRX, LS, LT, Coyote, EcoBoost, K-Series, and 2JZ builds. Every product is filterable by year, make, model, trim, engine, and drivetrain so the correct part ships the first time. Black Ops Auto Works carries 14,298 engine SKUs across performance, cooling, oil control, ignition, and appearance categories. What This Category Covers The Engine collection combines OEM-replacement engine service parts with performance aftermarket upgrades for supercharged, turbocharged, and naturally aspirated builds...

View Engine Products
Head Components

Head Components

Cylinder head components and engine internals for performance builds and OE service are stocked at Black Ops Auto Works. Shop complete cylinder heads, head gaskets, head stud and bolt kits, rocker arms, lifters, camshaft and lifter kits, rotating assemblies, and main stud and bolt kits for LS, LT, HEMI 5.7/6.1/6.4, Coyote, Cummins, Powerstroke, VW/Audi turbo, Subaru, Nissan, and import platforms. Every product is filterable by year, make, model, trim, engine, and drivetrain so the correct part ships the first time. Black Ops Auto Works carries 972 Head Components SKUs across component type, engine platform, and bore or gasket specification. What This Collection Covers Head Components groups together the parts that live at and around the cylinder head, the area of the engine most affected by heat, combustion pressure, and clamping load. This includes complete heads, head gaskets, head studs and bolts, rocker arms, lifters, camshaft and lifter kits, main stud and bolt kits, and ro...

View Head Components Products
Head Gaskets

Head Gaskets

Head gaskets for HEMI Hellcat, GM LS and LSX, Nissan RB26DETT and SR20, Subaru EJ series, BMW S58 and B58, VW/Audi turbo four cylinders, and Dodge Viper platforms are stocked at Black Ops Auto Works. Shop multi layer steel head gaskets, top end gasket kits, and bore and thickness specific gaskets from Cometic and HKS for street, track, and forced induction builds. Every product is filterable by year, make, model, trim, engine, and drivetrain so the correct part ships the first time. Black Ops Auto Works carries 601 Head Gaskets SKUs across bore size, gasket thickness, and platform specific categories. What This Category Covers The Head Gaskets category groups together the sealing components that sit between the cylinder head and engine block, along with related top end gasket kits. Coverage spans multi layer steel (MLS) head gaskets, DST cylinder head gaskets in multiple thickness options, top end gasket kits that include valve cover and intake gaskets, and application specific ...

View Head Gaskets Products
Supertech

Supertech

Supertech engine internals including valves, valve springs, retainers, and valvetrain components are stocked at Black Ops Auto Works for a wide range of import and domestic engine platforms. Shop upgraded parts for BMW M54, Ford and Mazda Duratec, Honda Civic and CR-Z, Nissan KA24, VQ35, and RB26, Toyota 4AGE, 2JZ, 5VZFE, and 2UZ-FE, Volkswagen and Audi EA888 and EA113, Mazda Miata, and Mini Cooper engines. Every product is filterable by year, make, model, trim, engine, and drivetrain so the correct part ships the first time. Black Ops Auto Works carries 617 Supertech SKUs spanning valves, springs, retainers, and related valvetrain hardware across import and domestic engine families. What This Collection Covers Supertech specializes in precision engine internals for naturally aspirated and turbocharged builds, manufacturing valves, valve springs, retainers, locks, and seals engineered for high RPM durability and improved airflow. This collection brings together fitment verified ...

View Supertech Products
Military & First Responder Discounts

Military & First Responder Discount Program

Black Ops Auto Works proudly honors active duty military, veterans, National Guard, reserves, police officers, firefighters, and EMTs with an exclusive 5% discount on all performance parts and carbon fiber upgrades. Verify instantly and start saving today.

Learn More & Apply

Your cart

×