Steel Spool For GM 12 Bolt Truck With 30 Spline Axles 3.73 And Up Yukon Gear & Axle Suspension - Sway Bars & Components have made them a favorite

have made them a favorite for performance enthusiasts

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For even better airflow and faster turbos spool-up add the 25936 Boost Tube Upgrade Kit

The Only correct fitting to use is a contoured port fitting with an O-ring seal such as : Part # AT985081ERL

Steel Spool For GM 12 Bolt Truck With 30 Spline Axles 3.73 And Up Yukon Gear & Axle Suspension - Sway Bars & Components have made them a favoriteYukon performance spools are made from the highest quality materials to ensure high strength and long life in performance applications. Details: Fits GM 12 bolt truck with 30 spline axles 3. 73 and up ratio only Provides 100 percent traction to both wheels at all times Not recommended for street driven vehicles Machined from high quality steel alloy Limited Lifetime Warranty Against Manufacturer Defects Sold As Each Technical Notes: Requires c clip