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Ferrea Subaru EJ20 37mm 5.97mm 104.6mm 19 Deg S-Flo +1mm Competition Plus Intake Valve - Set of 8 Ferrea FERF1524P
Ferrea Subaru EJ20 37mm 5.97mm 104.6mm 19 Deg S-Flo +1mm Competition Plus Intake Valve - Set of 8 Ferrea FERF1524P
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Ferrea Subaru EJ20 37mm 5.97mm 104.6mm 19 Deg S-Flo +1mm Competition Plus Intake Valve - Set of 8

Ferrea
FERF1524P
Valves
5 Units In Stock - Ships Next Business Day
$ 280.48 $ 252.43
$ 252.43

SKU: F1524P

Ferrea Subaru EJ20 37mm 5.97mm 104.6mm 19 Deg S-Flo +1mm Competition Plus Intake Valve - Set of 8 for 2002-2005 Impreza WRX

Ferrea Competition Plus intake valves upgrade Subaru EJ20 DOHC engines with a set of 8 high-flow replacements. Designed for 2002-2005 Impreza WRX and similar EJ20 builds these 37mm valves fit ported or stock heads. S-Flo technology and +1mm length increase airflow and support high-RPM performance.

Key Features

  • 37mm Valve Head: Larger diameter boosts intake airflow for more power in turbocharged EJ20 applications
  • 5.97mm Stem Diameter: Provides exact OEM-match strength with reduced weight for faster valve action
  • 104.6mm Overall Length: +1mm intake extension accommodates spring adjustments in performance heads
  • 19-Degree Seat Angle: Precision 19° x 30° x 60° angles ensure reliable sealing under extreme boost pressure
  • S-Flo Technology: Patented swirl-flow design directs air efficiently into combustion chamber for gains across RPM range

Product Notes

  • Intended for competition and high-performance EJ20 engine rebuilds
  • Pair with Ferrea springs retainers and seals for full valvetrain reliability
  • Packaged securely to prevent damage during transit

Installation Notes

  • Professional installation recommended.
  • Verify and adjust valve spring installed height for +1mm length
  • Direct fit in EJ20 DOHC heads uses stock guides and hardware

This Part Fits

Year Make Model Submodel
2002-2005 Subaru Impreza WRX
1999-2001 Subaru Impreza RS
1998-2002 Subaru Forester S/T
1993-2000 Subaru Impreza Base/L
1994-1998 Subaru Legacy GT/Base

Why Choose Ferrea?

  • Valves power wins in Formula Drift NHRA and global racing series
  • Advanced stainless steel withstands 1000+ degree exhaust gas temperatures
  • CNC-machined in USA for micron-level tolerances and balance

Frequently Asked Questions

  • Q: Does this fit 2002-2005 Subaru Impreza WRX EJ205 heads?
    A: Yes F1524P provides direct replacement for EJ20/EJ205 DOHC intake positions in WRX builds
  • Q: What material construction offers heat resistance?
    A: Competition Plus series uses proprietary stainless steel with enhanced fatigue strength for prolonged high-boost durability
  • Q: What warranty coverage applies?
    A: Ferrea provides limited lifetime warranty on manufacturing defects when installed by certified engine builder

Shipping & Handling

  • Method: UPS Ground or USPS Priority
  • Availability: In stock - ships same or next business day
  • Packaging: Original Ferrea box 8 x 6 x 4 inches
  • Weight: 2 lbs

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Ferrea

Ferrea

Ferrea Racing Components has been engineering high-performance valvetrain parts for motorsport and street performance applications for nearly five decades, specializing in intake and exhaust valves, valve springs, retainers, and guides built to tolerances that exceed OEM specifications. The company supplies components to professional racing teams across drag racing, road racing, and circle track disciplines while also offering direct fitment parts for the performance street market. Engine builders who are serious about head flow, valve durability under extreme spring pressures, and consistent seat sealing under sustained high-rpm use rely on Ferrea's catalog to outperform OEM replacement hardware. This collection brings together Ferrea's full range of valvetrain components for the most common domestic and import performance engine families.Popular UpgradesFerrea's Competition Plus valve series uses a one-piece forged design with a hard chrome stem coating that resists galling at ext...

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