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GSC2024-8-GSC P-D 4B11T 21-4N Chrome Polished Intake Valve - 36mm Head (+1mm) - SET 8-Valves-GSC Power Division
GSC P-D 4B11T 21-4N Chrome Polished Intake Valve - 36mm Head (+1mm) - SET 8 - Black Ops Auto Works
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GSC P-D 4B11T 21-4N Chrome Polished Intake Valve - 36mm Head (+1mm) - SET 8

GSC2024-8
GSC2024-8
Valves
13 Units In Stock - Ships Next Business Day
$ 205.74 $ 174.88
$ 174.88

SKU: 2024-8

GSC P-D 4B11T 21-4N Chrome Polished Intake Valve - 36mm Head (+1mm) - SET 8 for 2008-2016 Mitsubishi Lancer Evolution X

GSC Power-Division intake valves deliver precise engineering for the Mitsubishi 4B11T engine in Lancer Evolution X models from 2008 to 2016. This set of 8 features a 36mm head diameter +1mm over stock for greater airflow volume alongside 21-4N stainless construction that handles high boost and RPM. Chrome polishing reduces friction for reliable sealing and extended service life in performance setups.

Key Features

  • 36mm Head Diameter (+1mm O/S): Increases intake flow capacity by larger port matching to support 500+ whp builds without restricting air velocity
  • 21-4N Stainless Steel: High-nickel alloy resists fatigue and heat up to 1600°F ideal for turbocharged 4B11T applications
  • Chrome Polished Finish: Lowers valve guide wear by 50% and enhances seat life through smoother surface and better lubrication retention
  • 5.96mm Stem / 104.60mm Length: Matches OEM geometry for drop-in stem fit with upgraded springs while maintaining valve train stability
  • Complete Set of 8: Full intake replacement ensures balanced flow across all cylinders for even power delivery

Product Notes

  • Valve seat machining required for +1mm oversized head to achieve proper interference fit
  • Inspect valve guides for wear before installation and consider bronze guides for extreme builds
  • Packaged in individual protective sleeves to prevent damage during transit

Installation Notes

  • Professional installation recommended.
  • Machine valve seats 0.5-1.0mm for 36mm head using multi-angle cutter for optimal flow
  • Compatible with OEM retainers and GSC valve springs part 2003 or equivalents

This Part Fits

Year Make Model Submodel
2008-2015 Mitsubishi Lancer Evolution GSR
2008-2015 Mitsubishi Lancer Evolution MR
2015 Mitsubishi Lancer Evolution Final Edition
2009-2014 Mitsubishi Lancer Ralliart

Why Choose GSC Power-Division?

  • Proven in NHRA drag racing and NASA time attack with multiple championship teams
  • CNC machined in the USA with tolerances under 0.0005 inches for repeatability
  • Backed by defect warranty when installed by certified shops

Frequently Asked Questions

  • Q: Will these valves fit all 2008-2015 Mitsubishi Evo X models?
    A: Yes they directly fit GSR MR and Final Edition submodels with the stock 4B11T cylinder head along with 2009-2014 Lancer Ralliart
  • Q: What makes the chrome polish different from standard valves?
    A: Chrome polish creates a harder micro-finish that cuts guide wear and improves heat transfer for consistent performance over 100k miles
  • Q: Do I need new valve springs with these?
    A: Stock springs work for mild builds under 350whp but upgrade to GSC springs for 400+whp to control float at 9000+RPM

Shipping & Handling

  • Method: Standard ground
  • Availability: In stock - ships same or next business day
  • Packaging: Individual sleeves in 6 x 4 x 2 inch box
  • Weight: 0.95 lbs

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