-15%
GSC P-D 4G63T Evo 1-9 / 90-98 DSM Chrome Polished Exhaust Valve - 31.5mm Head (+1mm) - SET 8 GSC Power Division GSC2003-8
Click to zoom in

GSC P-D 4G63T Evo 1-9 / 90-98 DSM Chrome Polished Exhaust Valve - 31.5mm Head (+1mm) - SET 8

GSC2003-8
GSC2003-8
Valves
5 Units In Stock - Ships Next Business Day
$ 197.78 $ 168.11
$ 168.11

SKU: 2003-8 | UPC: GSC2003-8

GSC P-D 4G63T Evo 1-9 / 90-98 DSM Chrome Polished Exhaust Valve - 31.5mm Head (+1mm) - SET 8

GSC Power-Division chrome polished exhaust valves feature 31.5mm oversized heads and fit the 4G63T engine in Mitsubishi Lancer Evolution 1-9 models and 1990-1999 DSM vehicles including Eclipse GST GSX Talon TSi Galant VR-4 and Laser RS. This set of 8 one-piece forged valves improves exhaust flow and withstands high heat in performance engines. Stem diameter measures 6.48mm with overall length of 109.9mm for direct compatibility after machining.

Key Features

  • Oversized 31.5mm head +1mm: Boosts exhaust flow volume for quicker cylinder scavenging and power gains in turbocharged 4G63T builds
  • Chrome polished stems: Cuts friction against guides enhances heat dissipation and extends valve life under high RPM stress
  • Stellite bead welded seats: Delivers seat recession resistance stronger than coatings for long-term reliability in racing
  • Swirl polished backs and tops: Sharpens airflow over valve surfaces to support higher boost levels without restriction
  • One-piece forged steel build: Maintains structural integrity at redline with bead blast finish for smooth operation

Product Notes

  • Requires valve seat machining for +1mm oversized heads during installation
  • Inspect valve springs and retainers for compatibility with performance camshafts
  • Packages in protective foam-lined box measuring 6in x 4in x 2in

Installation Notes

  • Professional installation recommended.
  • Perform three-angle valve job to match oversized heads and stellite seats
  • Compatible with stock DSM Evo heads no special hardware needed

This Part Fits

Year Make Model Submodel
1990-1998 Eagle Talon TSi
1990-1994 Mitsubishi Eclipse GS
1990-1999 Mitsubishi Eclipse GST
1990-1999 Mitsubishi Eclipse GSX
1996-1999 Mitsubishi Eclipse Spyder GST
1991-1992 Mitsubishi Galant VR-4
2005-2006 Mitsubishi Lancer Evolution
2005-2006 Mitsubishi Lancer Evolution MR
2005-2006 Mitsubishi Lancer Evolution RS
2006 Mitsubishi Lancer Evolution SE
1990-1994 Plymouth Laser RS

Why Choose GSC Power-Division?

  • Leads valvetrain components for 4G63T in drag road race applications worldwide
  • Builds valves with submerged arc stellite welding unmatched by competitors
  • Engineers every dimension for DSM Evo cylinder heads from dyno testing

Frequently Asked Questions

  • Q: Will these valves fit all Evo 1-9 models?
    A: Yes set matches 4G63T heads in Evo 1 through 9 including US 2003-2006 Lancer Evolution variants after standard +1mm machining
  • Q: What finish and material details apply?
    A: One-piece forged steel with chrome polished stems stellite bead seats swirl polished heads and bead blast surface for flow and wear resistance
  • Q: What warranty coverage exists?
    A: GSC Power-Division offers limited lifetime warranty against manufacturing defects when installed by certified shop

Shipping & Handling

  • Method: UPS Ground or USPS Priority
  • Availability: In stock - ships same or next business day
  • Packaging: Secure foam-lined box 6 x 4 x 2 inches
  • Weight: 1.0 lb product 1.5 lb shipping

Request For Information

Have questions about GSC P-D 4G63T Evo 1-9 / 90-98 DSM Chrome Polished Exhaust Valve - 31.5mm Head (+1mm) - SET 8? Fill out the form below and we'll get back to you by the next business day.
GSC Power Division

GSC Power Division

GSC Power Division camshafts and valvetrain parts for turbocharged import engines are stocked at Black Ops Auto Works. Shop camshafts, valve springs, retainers, valves, and head studs engineered for the Toyota 2JZ, Nissan RB26 and VR38DETT, Mitsubishi 4G63, Subaru EJ257 and FA20, and Honda K20 platforms. Every product is filterable by engine code, cam grind, and application so the correct part ships the first time. Black Ops Auto Works carries 407 GSC Power Division SKUs across camshaft, valvetrain, and engine internal categories. What This Brand Covers GSC Power Division is a specialist engine internals brand focused on camshafts, valve springs, retainers, and valves engineered specifically for high output turbocharged import engines. The catalog is built around specific engine codes rather than complete vehicles, which means the same part often applies across multiple chassis that share an engine platform. Brand Focus GSC Power Division designs valvetrain components for engine...

View GSC Power Division 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

×