MANLEY 11133-8 Exhaust Valve Kit Race Series for MITSUBISHI 4G63 / 4G63T Engine

MANLEY 11133-8 Race Series Exhaust Valve Kit for Mitsubishi 4G63 / 4G63T Engine

The MANLEY 11133-8 Exhaust Valve Kit is a Race Series solution tailored for high-performance Mitsubishi 4G63 and 4G63T engines. Specifically designed for motorsport applications including drag, bracket, and circuit racing environments operating below 8000 RPM, these valves are constructed from premium XH-426 stainless steel for exceptional strength and durability. Engineered with advanced design features such as swirl polishing and full machining, they deliver reliable, high-flow performance—particularly in alcohol-fueled engines subject to extreme thermal and mechanical stress.

• High-strength XH-426 stainless steel construction for exhaust durability
• Chrome-plated stems and hardened tips for enhanced wear resistance
• Swirl-polished underhead and fully machined combustion face for improved flow
• Available in Race Master (straight stem) and Race Flo profiles
• Optimized for use in alcohol-fueled high-performance engines

Specifications:

• Product Market: Sport Compact
• Head Diameter: 30.50 mm
• Stem Diameter: 0.2575 in / 6.54 mm
• Overall Length: 109.70 mm
• Tip Length: 3.80 mm
• Margin Width: 0.065 in
• Seat Width: 0.080 in
• Top of Head: 17° Dish
• Underhead Angle (Pro Flo): 22.00°
• Underhead Radius: 7/16 in
• Valve Series: Race Series
• Valve Type: Exhaust
• Product Type: Engine Exhaust Valve Kit
• Valve Quantity: 8
• Engine Detail: DOHC 16 Valve (Mitsubishi 4G63 / 4G63T)