T4 Riser Block - GM 6.6L Duramax With wastegate port 2 3/8 inch Height (116006058). An additional turbocharger riser block is required for larger bodied turbos (GT42R or larger).
Features:

• T4 Riser Block (With Wastegate Port)
• 2.375 Inches tall
• 1.875 Inch side port
• Wastegate port sized for 1.75 inch or 2 inch tubes
• Billet Steel
• Installation parts include (4 studs and 4 nuts)
• Sold As A Kit

Applications:

• GM 6.6L Duramax