-20%
BLOX Racing Cylinder Head to Exhaust Manifold MLS Gasket for Subaru EJ20/EJ25 (Pair) BLOX Racing BLOBXFL-50010
BLOX Racing Cylinder Head to Exhaust Manifold MLS Gasket for Subaru EJ20/EJ25 (Pair) BLOX Racing BLOBXFL-50010
Click to zoom in

BLOX Racing Cylinder Head to Exhaust Manifold MLS Gasket for Subaru EJ20/EJ25 (Pair)

BLOX Racing
BLOBXFL-50010
BXFL-50010
Exhaust Gaskets
20+ Units In Stock - Ships Next Business Day
$ 18.00 $ 14.40
$ 14.40

SKU: BXFL-50010

BLOX Racing Cylinder Head to Exhaust Manifold MLS Gasket for Subaru EJ20/EJ25 Turbo Models 2002-2017 (Pair)

BLOX Racing Cylinder Head to Exhaust Manifold MLS Gaskets provide a precise seal for Subaru EJ20 and EJ25 turbocharged engines in WRX STI Forester XT Legacy GT Outback XT Impreza WRX Baja and Saab 9-2X from 2002 to 2017. These gaskets handle extreme exhaust gas temperatures and boost pressures over 40 psi to prevent leaks and deliver consistent power in high-performance setups. A pair ensures complete coverage for left and right sides supporting 500+ whp applications.

Key Features

  • Multi-Layer Steel Construction: Three layers of embossed 301 stainless steel with vermiculite and elastomeric coatings form a gas-tight seal resisting over 40 psi pressure and temperatures above 1800°F.
  • Direct OEM Replacement: Matches factory port shapes and bolt patterns for EJ20T EJ25T turbo engines including OEM PN 11095AA421 for bolt-on fit without modifications.
  • Pair for Complete Coverage: Both left and right gaskets included to cover the full exhaust manifold for balanced flow and leak-free operation.
  • Boost and Heat Resistant: Holds integrity during high turbo boost and EGT spikes in modified Subaru engines for reliable performance.
  • Reusability Potential: Built for multiple heat cycles with proper torque unlike single-use composite designs.

Product Notes

  • Inspect cylinder head and manifold surfaces for flatness before installation to ensure optimal sealing.
  • Torque bolts in sequence to 22-25 ft-lbs using M8x1.25x55mm OEM-style studs or equivalents.
  • Store in cool dry place protected from oil contamination prior to use.

Installation Notes

  • Professional installation recommended.
  • Clean mating surfaces thoroughly and apply thin anti-seize to bolts.
  • Compatible with OEM exhaust manifold hardware and aftermarket studs.

This Part Fits

Year Make Model Submodel
2006-2009 Subaru Legacy GT spec.B
2005-2006 Subaru Outback XT
2005-2009 Subaru Outback XT Limited
2015-2017 Subaru WRX STI Base
2015 Subaru WRX STI Launch Edition
2015-2017 Subaru WRX STI Limited
2016 Subaru WRX STI Series.HyperBlue
2006 Saab 9-2X Aero
2004-2006 Subaru Baja Turbo
2008 Subaru Forester Sports 2.5 XT
2004-2005 Subaru Forester XT
2009 Subaru Forester XT
2006-2010 Subaru Forester XT Limited
2005 Subaru Forester XT Premium
2010-2013 Subaru Forester XT Premium
2011-2013 Subaru Forester XT Touring
2002-2014 Subaru Impreza WRX
2006-2007 Subaru Impreza WRX Limited
2010-2014 Subaru Impreza WRX Limited
2009-2014 Subaru Impreza WRX Premium
2004-2014 Subaru Impreza WRX STI
2007 Subaru Impreza WRX STI Limited
2011-2014 Subaru Impreza WRX STI Limited
2010 Subaru Impreza WRX STI Special Edition
2006-2007 Subaru Impreza WRX TR
2010-2012 Subaru Legacy 2.5GT
2005-2006 Subaru Legacy GT
2005 Subaru Legacy GT Limited
2007-2009 Subaru Legacy GT Limited

Why Choose BLOX Racing?

  • BLOX Racing leads in JDM performance parts with track-proven designs used in rally and drag racing.
  • Manufactured with premium materials meeting motorsport standards for consistent results.
  • Precision engineered in USA for exact fitment on Subaru turbo platforms.

Frequently Asked Questions

  • Q: Will this fit my 2004 Subaru Impreza WRX STI EJ255?
    A: Yes it directly replaces OEM gasket PN 11095AA421 on all EJ20T EJ25T turbo variants listed.
  • Q: What materials are used in these MLS gaskets?
    A: Three layers of 301 stainless steel with vermiculite coating and elastomer beads for sealing.
  • Q: Is there a warranty and what about reusability?
    A: BLOX offers 1-year defect warranty. Gaskets support reuse if undamaged and torqued properly.

Shipping & Handling

  • Method: UPS Ground / USPS Priority Mail
  • Availability: In stock - ships same or next business day
  • Packaging: Flat envelope 9 x 6 x 0.5 inches
  • Weight: 0.25 lbs

Request For Information

Have questions about ? Fill out the form below and we'll get back to you by the next business day.
BLOX Racing

BLOX Racing

BLOX Racing has built a strong following in the import and sport compact community since 2003 by delivering parts that meet or exceed OEM quality standards at prices that make building accessible. Every BLOX product is designed with ISO 9001-certified manufacturing processes and subjected to rigorous testing before release, ensuring fitment and reliability that matches the performance they advertise. Popular Upgrades BLOX Racing intake manifolds and throttle bodies are popular for Honda, Acura, and other sport compact platforms, delivering improved airflow and throttle response over stock components. Suspension components including adjustable end links, sway bars, and pillow ball mounts allow precise handling tuning for street and autocross use. Engine hardware — cam gears, valve train components, and timing chain kits — rounds out the BLOX catalog for builders pushing beyond stock engine parameters. What platforms does BLOX Racing support? BLOX Racing focuses primarily on Honda, Ac...

View BLOX Racing Products
Engine

Engine

Shop engine parts, oil catch cans, engine cooling upgrades, thermostats, thermostat housings, radiators, coolant accessories, supercharger pulleys, idler pulleys, tensioner pulleys, throttle bodies, engine covers, fuse box covers, cap covers, valve covers, oil system parts, ignition parts, sensors, gaskets, fuel delivery parts, and engine bay dress-up accessories at Black Ops Auto Works. This collection is built for performance vehicles, trucks, SUVs, muscle cars, boosted builds, HEMI platforms, Hellcat builds, Trackhawk SUVs, RAM TRX trucks, LS-powered builds, and high-horsepower street or track applications. Whether you are improving oil control, reducing heat soak, upgrading cooling, supporting higher boost, cleaning up the engine bay, replacing worn engine components, or preparing a street car for harder driving, this collection helps you shop engine parts by brand, category, vehicle platform, and performance goal. Shop Engine Parts by Category Browse engine upgrades and replace...

View Engine Products
Exhaust Components

Exhaust Components

Exhaust Hardware & Performance Exhaust Parts Upgrade your vehicle with premium exhaust components, exhaust hardware, and performance exhaust parts. This collection includes high-quality exhaust gaskets, exhaust adapters, exhaust cutouts, exhaust hangers, exhaust wrap, oxygen sensors, and valve controllers designed to improve exhaust flow, durability, and overall system performance. Exhaust Components from Top Brands Shop trusted brands including Vibrant Performance, DEI, BD Diesel, BLOX Racing, MAHLE, Victor Reinz, NGK, AWE Tuning, Akrapovic, Granatelli, and Torque Solution. These brands are trusted for street performance, diesel applications, turbo builds, and custom exhaust fabrication. Shop Exhaust Components by Category Find exhaust gaskets (MLS, manifold, turbo, and flange gaskets), exhaust adapters and fittings, exhaust cutouts and valve systems, exhaust hangers and mounting hardware, exhaust wrap and heat shielding, O2 sensors and emissions components, exhaust brakes and ...

View Exhaust Components Products
Exhaust Gaskets

Exhaust Gaskets

Exhaust gaskets create the leak-free seal between your exhaust manifold, headers, downpipe, and catalytic converter. Quality gaskets are critical for preventing exhaust leaks that reduce power, increase emissions, and create safety hazards in the engine bay. Popular Upgrades Most frequently replaced exhaust gaskets include exhaust manifold-to-head gaskets for high-mileage vehicles, turbo downpipe gaskets for boosted engines, and collector gaskets for custom header builds. MLS (multi-layer steel) gaskets are the most popular choice for performance applications. What types of exhaust gaskets are available? Exhaust gaskets come in several types: multi-layer steel (MLS) gaskets for high-performance and boosted engines, copper exhaust gaskets for custom and race builds, graphite gaskets for OEM-style replacement, and specialized turbo inlet and outlet gaskets for turbocharged applications. Can I reuse exhaust gaskets? Most exhaust gaskets should not be reused, particularly MLS and graphi...

View Exhaust Gaskets Products
Exhaust Systems

Exhaust Systems

Performance exhaust systems improve exhaust sound, flow, appearance, and driving character for cars, trucks, SUVs, Jeeps, diesel vehicles, and high-performance builds. Shop more than 7,400 cat-back exhausts, axle-back systems, headers, downpipes, mid-pipes, X-pipes, H-pipes, mufflers, resonators, catalytic converters, exhaust tips, valve controllers, and installation hardware at Black Ops Auto Works. This collection includes exhaust upgrades from trusted brands such as Borla, CORSA Performance, MagnaFlow, MBRP, Kooks Headers, AWE Tuning, Akrapovič, Thermal R&D, Solo Performance, Invidia, Gibson, BBK, Stainless Works, Mishimoto, HKS, ISR Performance, Fabspeed, Granatelli, Formula Z, and CornerStone Performance. Use the filters to shop by vehicle, exhaust type, material, pipe diameter, exit configuration, tip finish, sound level, and emissions requirements. Shop Performance Exhaust Systems by Category Choose the exhaust category that matches your performance goal, preferred sound,...

View Exhaust Systems 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

×