-20%
Manley Performance Manley 00-03 Subaru WRX (EJ20) / 04 STi Exhaust 32mm Stainless Extreme Duty Valves
Manley Performance Manley 00-03 Subaru WRX (EJ20) / 04 STi Exhaust 32mm Stainless Extreme Duty Valves
Manley Performance Manley 00-03 Subaru WRX (EJ20) / 04 STi Exhaust 32mm Stainless Extreme Duty Valves
Manley Performance Manley 00-03 Subaru WRX (EJ20) / 04 STi Exhaust 32mm Stainless Extreme Duty Valves
Manley Performance Manley 00-03 Subaru WRX (EJ20) / 04 STi Exhaust 32mm Stainless Extreme Duty Valves
Click to zoom in

Manley 00-03 Subaru WRX (EJ20) / 04 STi Exhaust 32mm Stainless Extreme Duty Valves

MAN11137-8
807298030845
Valves
2 Units In Stock - Ships Next Business Day
$ 685.43 $ 548.34
$ 548.34

SKU: 11137-8 | UPC: 807298030845

Manley 00-03 Subaru WRX (EJ20) / 04 STi Exhaust 32mm Stainless Extreme Duty Valves

Manley Extreme Duty Series exhaust valves deliver reliable performance in high-stress environments like drag racing and circle track competition. These 32mm stainless steel valves fit 2000-2003 Subaru WRX with EJ20 engines and 2004+ STI models, plus select Impreza WRX variants and Saab 9-2X Aero. Designed for extreme heat and RPM demands, they support engine builds pushing maximum power output.

Key Features

  • Stainless Steel Construction: High-chrome alloy resists heat fatigue and corrosion for extended durability in turbocharged EJ20/EJ25 applications
  • 32mm Exhaust Valve Diameter: Optimized size improves exhaust flow, boosting horsepower and spool time in WRX/STI turbo setups
  • 7.95mm Stem Diameter: Precision-ground stems ensure perfect sealing and guide fit in Subaru cylinder heads
  • Extreme Duty Engineering: Tested for Top Fuel drag, marine Big Block Chevy, and restricted carb circle track use, handling over 10,000 RPM
  • Set of 8 Valves: Complete exhaust valve set (MPN 11137-8) for one Subaru EJ20T or EJ257 head replacement

Product Notes

  • Valves require proper valve seat machining for best heat dissipation and longevity
  • Inspect valve guides and springs during installation for compatibility
  • Store in dry conditions to prevent surface oxidation

Installation Notes

  • Professional installation recommended.
  • Valve lash adjustment critical. follow Subaru EJ20/EJ25 specs (intake 0.008-0.010", exhaust 0.010-0.012")
  • Compatible with stock or aftermarket retainers, keepers, and dual valve springs

This Part Fits

Year Make Model Submodel
2005-2006 Saab 9-2X Aero
2002-2012 Subaru Impreza WRX
2006-2007,2010-2012 Subaru Impreza WRX Limited
2009-2012 Subaru Impreza WRX Premium
2004-2012 Subaru Impreza WRX STI
2007,2011-2012 Subaru Impreza WRX STI Limited
2010 Subaru Impreza WRX STI Special Edition
2006-2007 Subaru Impreza WRX TR

Why Choose Manley?

  • Decades of motorsport engineering for Subaru turbo engines
  • CNC-machined tolerances hold up under 50+ psi boost
  • Backed by real-world testing in NHRA and circle track series

Frequently Asked Questions

  • Q: Will these fit 2004-2007 Subaru STI with EJ257 heads?
    A: Yes, 11137-8 exhaust valves match 32mm chambers in EJ257 heads for 2004-2012 STI models including Limited and Special Edition
  • Q: What material are these valves made from?
    A: One-piece stainless steel with high nickel content for superior heat resistance up to 1600°F in turbo exhaust ports
  • Q: Do I need new valve seals with this set?
    A: Recommended to replace seals and guides. pair with Manley 11945-8 intake valves for full rebuild

Shipping & Handling

  • Method: UPS Ground or USPS Priority
  • Availability: In stock - ships same or next business day
  • Packaging: Protective foam-lined box, 10 x 6 x 2 inches
  • Weight: 0.80 lbs

Request For Information

Have questions about Manley 00-03 Subaru WRX (EJ20) / 04 STi Exhaust 32mm Stainless Extreme Duty Valves? Fill out the form below and we'll get back to you by the next business day.
Manley Performance

Manley Performance

Manley Performance is a New Jersey-founded engine internals manufacturer stocked at Black Ops Auto Works, supplying forged pistons, connecting rods, valves, and crankshafts across domestic and import platforms. Shop Manley H-Beam and H-Tuff connecting rods, Race Master Series valves, forged crankshafts, and valve springs for Ford Modular and Coyote, Chrysler HEMI, Subaru EJ and FA, Nissan SR20 and 2JZ, Honda B and H-series, and Mitsubishi 4B11T and Mazda MZR platforms. Every product is filterable by year, make, model, and engine code so the correct part ships the first time. Black Ops Auto Works carries 270 Manley Performance SKUs across pistons, rotating assembly, and valvetrain components. About Manley Performance Founded in 1966 by Hank Manley as Manley Speed Equipment, Manley Performance has grown into one of the most established names in high-performance engine internals. From grassroots drag racing roots in New Jersey to a second manufacturing facility in Orange, Californi...

View Manley Performance Products
Valves

Valves

Engine valves for import, domestic, and European performance builds are stocked at Black Ops Auto Works. Shop intake valves, exhaust valves, single-groove and triple-groove valves, Inconel and titanium valves, and complete valve sets for 2JZ, RB26, RB25, VR38DETT, K-series, EA888, EA113, FA20, S58, B58, and HEMI 5.4L and 5.7L applications. 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 577 valve SKUs across intake, exhaust, and material specification categories. What This Category Covers The Valves category covers replacement and upgraded intake and exhaust valves for naturally aspirated, turbocharged, and supercharged cylinder heads. Coverage spans budget-focused OE-spec valves through race-grade Inconel and titanium valves built for sustained high RPM and boosted horsepower. Categories Included Intake valves, exhaust valves, single valves sold individually, and full valve set...

View Valves Products
Valves & Components

Valves & Components

Valves and valvetrain components for import, domestic, and performance engine platforms are stocked at Black Ops Auto Works. Shop intake valves, exhaust valves, valve covers, valve cover gaskets, valve guides, valve springs, retainers, valve locks, valve seals, and lash caps for Toyota 2JZ and Supra, Honda K-Series, Nissan RB and SR20, BMW B58 and S58, Subaru FA20, Ford Coyote, and GM LS platforms. Every part is filterable by year, make, model, and engine so builders and tuners can confirm fitment before ordering. Black Ops Auto Works carries 1,391 valvetrain SKUs from proven performance brands. What This Category Covers Valves and valvetrain components manage airflow into and out of the combustion chamber and keep the valvetrain sealed and stable at high RPM. This collection spans intake valves, exhaust valves, valve covers, valve cover gaskets, valve guides, valve springs, retainers, valve locks, valve seals, lash caps, and cam follower shims. Why the Valvetrain Matters for Pe...

View Valves & Components 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

×