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Manley Performance Manley 00-03 Subaru WRX (EJ20) / 04 STi Exhaust 32mm Stainless Race Master Valves
Manley Performance Manley 00-03 Subaru WRX (EJ20) / 04 STi Exhaust 32mm Stainless Race Master Valves
Manley Performance Manley 00-03 Subaru WRX (EJ20) / 04 STi Exhaust 32mm Stainless Race Master Valves
Manley Performance Manley 00-03 Subaru WRX (EJ20) / 04 STi Exhaust 32mm Stainless Race Master Valves
Manley Performance Manley 00-03 Subaru WRX (EJ20) / 04 STi Exhaust 32mm Stainless Race Master Valves
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Manley 00-03 Subaru WRX (EJ20) / 04 STi Exhaust 32mm Stainless Race Master Valves

MAN11155-8
807298044637
Valves
20+ Units In Stock - Ships Next Business Day
$ 263.93 $ 211.14
$ 211.14

SKU: 11155-8 | UPC: 807298044637

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

Manley Race Master valves deliver reliable performance for Subaru EJ20 and EJ25 engines in 00-03 WRX and 04 STI models plus later Impreza variants. These 32mm exhaust valves handle demanding race conditions in bracket drag oval track applications up to 8000 RPM. Crafted from heat-resistant stainless steel they support high boost and sustained power output.

Key Features

  • 21-4N Stainless Steel Alloy: Forged one-piece design withstands extreme exhaust temperatures over 1600°F for long-term durability in turbocharged setups.
  • Swirl Polished Valve Backs: Enhances airflow reduces turbulence and shaves grams off rotating mass for quicker revving.
  • Fully Machined Margins: Eliminates grind lines ensures consistent seating and sealing under high spring pressures.
  • Bridge Balanced: Precision matched set of 8 valves minimizes vibration promotes smooth operation at peak RPM.
  • Exact Specs 32mm Head: 32.00mm diameter 97.50mm length 7.98mm stem fits EJ20T EJ205 EJ255 EJ257 heads directly.

Product Notes

  • Set of 8 exhaust valves MPN 11155-8 for complete cylinder head replacement.
  • Pair with performance valve guides and springs for full valvetrain upgrade.
  • Packaged weight 2.1 lbs box dimensions 10 x 6 x 3 inches for secure transit.

Installation Notes

  • Professional installation recommended.
  • Check valve guide clearance 0.0015-0.0025 inch prior to install.
  • Compatible with stock heads multi-angle valve job advised for best seal.

This Part Fits

Year Make Model Submodel
2005-2006 Saab 9-2X Aero
2002-2005 Subaru Impreza WRX
2006-2007 Subaru Impreza WRX
2008-2012 Subaru Impreza WRX
2006-2007 Subaru Impreza WRX Limited
2010-2012 Subaru Impreza WRX Limited
2009-2012 Subaru Impreza WRX Premium
2004-2007 Subaru Impreza WRX STI
2008-2012 Subaru Impreza WRX STI
2007 Subaru Impreza WRX STI Limited
2011-2012 Subaru Impreza WRX STI Limited
2010 Subaru Impreza WRX STI Special Edition
2006-2007 Subaru Impreza WRX TR

Why Choose Manley?

  • Proven in NHRA IHRA and SCCA racing for decades.
  • Hand-finished and 100% inspected in Southern California facility.
  • Engineered tolerances hold up under 40psi boost levels.

Frequently Asked Questions

  • Q: Will these fit 2002-2003 USDM WRX and 2004 STI heads?
    A: Yes designed specifically for EJ205 EJ20T exhaust ports in 00-03 WRX and EJ255 in 04 STI also compatible with 02-12 Impreza WRX STI variants listed.
  • Q: What alloy is used and why?
    A: Exclusive 21-4N H compound stainless steel provides high-temperature strength resists fatigue in turbo exhaust environments better than 310SS.
  • Q: What warranty coverage?
    A: Limited lifetime warranty against manufacturing defects when installed by certified engine builder.

Shipping & Handling

  • Method: UPS Ground or FedEx Ground
  • Availability: In stock - ships same or next business day
  • Packaging: Protective foam inserts in 10 x 6 x 3 inch corrugated box
  • Weight: 2.1 lbs

Request For Information

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