-15%
GSC Power-Division OEM Replacement Valve Spring Seat Set for 4G63T
Click to zoom in

GSC P-D 4G63T Valve Seat OEM Replacement (Set of 16)

GSC1004
GSC1004
Valve Springs, Retainers
3 Units In Stock - Ships Next Business Day
$ 26.40 $ 22.44
$ 22.44

SKU: 1004

GSC Power-Division OEM Replacement Valve Spring Seat Set for 4G63T (1990-2006 DSM & Evo)

GSC Power-Division OEM replacement valve spring seats deliver precise fit for 4G63T engines in DSM models like Eclipse GST GSX Talon TSi and Evo 8/9. This set of 16 replaces worn factory seats during upgrades to high-performance springs such as GSC Beehives without altering spring pressure. Maintain reliability at high RPM with direct OEM-spec thickness and design.

Key Features

  • OEM Dimensions: Matches factory thickness to preserve exact spring pressure and prevent bind during valvetrain upgrades
  • Set of 16: Complete kit covers all valves on 4G63T cylinder heads for full refresh
  • High-Strength Steel: Built to handle increased spring loads from performance kits while resisting wear
  • Direct Replacement: Drops in place of stock seats for seamless integration in stock or modified engines
  • Performance Ready: Ideal base for GSC Beehive or Super Beehive springs in racing or street applications

Product Notes

  • Sold as a complete set of 16 for one cylinder head
  • Inspect seats during spring upgrades to ensure proper spring bind clearance
  • Package weight 0.8 lbs ships in 6x4x2 inch box

Installation Notes

  • Professional installation recommended.
  • Remove cylinder head and press out old seats using proper tooling
  • Compatible with stock retainers and locks no additional 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 RS
2006 Mitsubishi Lancer Evolution SE
1990-1994 Plymouth Laser RS

Why Choose GSC Power-Division?

  • Proven in DSM and Evo racing with thousands of race wins
  • Engineered for durability under extreme boost and RPM
  • Precision machined in the USA for consistent valvetrain stability

Frequently Asked Questions

  • Q: Does this fit 2005-2006 Evo 8/9 with 4G63T?
    A: Yes fits all 4G63T heads including Evo 8 MR and 9 MR models directly as OEM replacement
  • Q: What material are these seats made from?
    A: High-strength steel construction matches OEM specs for heat resistance and load handling
  • Q: Do I need to change spring pressure settings?
    A: No same thickness as OEM ensures stock pressure with any compatible performance spring

Shipping & Handling

  • Method: UPS Ground or USPS Priority
  • Availability: In stock - ships same or next business day
  • Packaging: Compact box 6 x 4 x 2 inches
  • Weight: 0.8 lbs

Request For Information

Have questions about GSC P-D 4G63T Valve Seat OEM Replacement (Set of 16)? Fill out the form below and we'll get back to you by the next business day.
Engine

Engine

Engine parts and engine bay upgrades for Dodge, Jeep, RAM, Chrysler, Chevrolet, Ford, Toyota, Nissan, Subaru, and Honda vehicles are stocked at Black Ops Auto Works. Shop oil catch cans, supercharger pulleys, thermostats, radiators, cooling parts, throttle bodies, intake manifolds, headers, ignition coils, spark plugs, sensors, gaskets, fuel pumps, valve covers, engine covers, billet cap covers, and full engine bay dress-up parts for HEMI, Hellcat, Trackhawk, Redeye, Demon, Scat Pack, RAM TRX, LS, LT, Coyote, EcoBoost, K-Series, and 2JZ builds. 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 14,298 engine SKUs across performance, cooling, oil control, ignition, and appearance categories. What This Category Covers The Engine collection combines OEM-replacement engine service parts with performance aftermarket upgrades for supercharged, turbocharged, and naturally aspirated builds...

View Engine Products
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
Valve Springs, Retainers

Valve Springs, Retainers

Valve springs and retainers for high-RPM and boosted engine builds are stocked at Black Ops Auto Works. Shop dual and single valve springs, beehive-style valve springs, titanium and chromoly retainers, and matched spring-and-retainer kits for HEMI, LS, Coyote, K-series, EJ, and 2JZ platforms. 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 406 valve spring and retainer SKUs across spring rate, seat pressure, and material categories. What This Category Covers The Valve Springs, Retainers collection spans upgraded valve springs for higher lift camshafts, beehive-style springs for reduced valvetrain mass, and titanium retainers that shed weight from the reciprocating valvetrain. The catalog is strongest on Supertech valve springs and retainers for import four-cylinder builds, with broad coverage of dual spring kits for domestic V8 platforms running aggressive camshaft profiles. Cat...

View Valve Springs, Retainers 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

×