GSC Power Division Exhaust Valve Guide for 4G63 Manganese Bronze .003in Oversize

GSC Power Division Exhaust Valve Guide — 4G63 Manganese Bronze .003" Oversize Brand: GSC Power Division Upgrade your 4G63 cylinder head with this precision-engineered manganese bronze exhaust valve guide. Designed as a shorty "stopper" style in a .003" oversize, this single guide delivers improved durability, heat transfer, and valve-to-guide stability for performance and longevity. Exact fit: Engineered specifically for 4G63 applications to ensure correct seating and alignment. Material: Manganese bronze for superior wear resistance and thermal conductivity compared to standard cast iron guides. Size: .003" oversize to accommodate reground or oversized exhaust valves and extend service life. Shorty stopper design: Compact length reduces weight and allows compatibility with high-rpm valve trains and aftermarket valve springs. Sold individually: Purchase per guide to match your rebuild requirements. Ideal for race, street, and rebuilt engines where precision fit and heat management matter. Replace worn guides with this GSC Power Division manganese bronze unit to maintain valve stability, reduce oil consumption, and improve exhaust flow consistency.