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SKU: 2022-01
GSC P-D Mitsubishi 4B11T 21-4N Chrome Polished Intake Valve - 35mm Head (STD) - Single for 2008-2015 Lancer Evolution X, Ralliart & 2010-2014 Genesis Coupe
GSC Power-Division single chrome polished intake valve uses 21-4N stainless steel for Mitsubishi 4B11T engines in 2008-2015 Lancer Evolution X, Ralliart and 2010-2014 Hyundai Genesis Coupe 2.0T. Built for high boost and RPM in turbo setups, it boosts airflow with exact machining. Drop-in design fits stock valvetrain while handling extreme conditions for reliable power gains.
Key Features
- 21-4N Stainless Steel Construction: High-nickel alloy resists fatigue and holds strength at temperatures to 1600°F for sustained turbo performance.
- Chrome Polished Finish: Swirl polished stem cuts friction, improves heat transfer and prolongs valve guide wear for dependable operation.
- 35mm Standard Head Diameter: 35.00mm head, 5.95mm stem, 107.90mm length matches OEM for direct install with better airflow dynamics.
- One-Piece Forged Design: Forged construction avoids multi-piece failures, works with high lift cams and stiff valve springs.
- Precision Engineering: CNC tolerances deliver tight seating, leak-free seal and minimal bounce at peak RPM.
Product Notes
- Sold individually. Order four for full intake valve replacement.
- Check valve guides and seats before install for tight seal.
- Shipped in protective foam sleeve to avoid transit damage.
Installation Notes
- Professional installation recommended.
- Valve stem to guide clearance 0.020-0.060mm. Lap valves if required for seal.
- Works with stock retainers and springs. Use GSC springs for high RPM builds.
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2008-2015 | Mitsubishi | Lancer | Evolution X MR |
| 2008-2015 | Mitsubishi | Lancer | Evolution X GSR |
| 2009-2015 | Mitsubishi | Lancer | Ralliart |
| 2010-2011 | Mitsubishi | Lancer | Ralliart Sportback |
| 2010-2014 | Hyundai | Genesis Coupe | 2.0T |
| 2010-2014 | Hyundai | Genesis Coupe | 2.0T Premium |
| 2010-2014 | Hyundai | Genesis Coupe | 2.0T R-Spec |
| 2010 | Hyundai | Genesis Coupe | 2.0T Track |
Why Choose GSC Power-Division?
- Track tested in pro racing with dyno hours backing durability.
- Built to aerospace standards for defect-free reliability.
- Data driven for 4B11T engines with exact fitment specs.
Frequently Asked Questions
-
Q: Does this valve fit 2008-2015 Mitsubishi Lancer Evolution X MR?
A: Yes, direct fit for all 4B11T Evo X models including MR, GSR from 2008-2015 plus listed Ralliart. -
Q: What material is used and why chrome polished?
A: Forged 21-4N stainless steel for heat resistance. Chrome polish on stem reduces wear and holds oil for longer life. -
Q: What is the warranty and installation advice?
A: Limited lifetime warranty on defects. Pro install checks clearances and follows break-in procedure.
Shipping & Handling
- Method: UPS Ground or USPS Priority
- Availability: In stock - ships same or next business day
- Packaging: Protective foam sleeve in 6x4x1 inch box
- Weight: 0.2 lbs (including packaging)
GSC Power Division
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