STM Head Port Block Off Plate for 4G63 DSM/Evo

STM DSM/Evo 4G63 head port block off plates are designed to completely seal off your intake and/or exhaust ports while you have the manifolds off. Buy the set or individually as needed.

Whether you're building your motor or swapping out parts, this will keep dust, debris and creatures out of the ports and also makes your fresh build much more photogenic compared to bunched up paper towels when it comes time to show it off! Also great for shipping engines.

Vehicle Fitment:
Fits all 4G63 heads
1992-2006 Evolution I-IX
1990-1999 Eclipse GST/GSX
1990-1998 Talon TSi
1990-1994 Laser RS
1991-1992 Galant VR-4

Features:
• CNC Cut Aluminum
• STM Laser Engraved
• STM products are Made in the USA!
• Lifetime Warranty on STM Parts to the original purchaser against manufacturing defects

Purchase Includes:
Sold as a set or individually as needed.

STM Notes:
Updated March 2026, now made in-house at STM and the new design fits all 4G63.

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