estore the performance of your Garrett variable geometry turbocharger with the SWAG Performance 15mm Turbocharger Unison Ring & 9 Vane Kit. Designed as a direct replacement for worn or damaged VGT components, this kit is engineered specifically for Early 2003 Ford 6.0L Powerstroke and 2004.5-2005 GM 6.6L Duramax LLY turbochargers equipped with 15mm variable geometry vanes.
The factory VGT system relies on a precision-machined unison ring and movable vanes to regulate exhaust flow and optimize turbocharger performance across the entire RPM range. Over time, carbon buildup, corrosion, excessive heat, and normal wear can cause the unison ring and vanes to stick or bind, resulting in poor boost control, sluggish throttle response, excessive turbo lag, overboost or underboost conditions, loss of power, and diagnostic trouble codes. Replacing these critical wear components during a turbocharger rebuild restores smooth vane movement, proper boost regulation, and dependable turbocharger operation.
Manufactured from premium stainless steel and precision-machined for exceptional fit and durability, the SWAG Performance Unison Ring & Vane Kit is built to withstand the harsh temperatures and operating conditions inside Garrett GT37-series variable geometry turbochargers. Whether you're rebuilding a failed turbo or performing preventative maintenance, this kit delivers the quality and reliability needed for long service life.
Features & Benefits
- Direct replacement for worn or sticking VGT components
- Fits Garrett GT37-series turbochargers utilizing 15mm variable geometry vanes
- Precision-machined stainless steel unison ring
- Includes nine premium 15mm variable geometry turbo vanes
- Restores smooth vane movement and proper turbo operation
- Helps eliminate sticking vanes caused by carbon buildup and corrosion
- Improves turbo spool-up, throttle response, boost control, and overall drivability
- Ideal for turbocharger rebuilds and preventative maintenance
- Manufactured for long-lasting durability under extreme exhaust temperatures
Kit Includes
- (1) Stainless Steel Turbocharger Unison Ring
- (9) Precision 15mm Variable Geometry Turbo Vanes
Vehicle Fitment
Ford Powerstroke
- 2003 Ford F-250 Super Duty 6.0L Powerstroke (Early Production)
- 2003 Ford F-350 Super Duty 6.0L Powerstroke (Early Production)
- 2003 Ford Excursion 6.0L Powerstroke (Early Production)
GM Duramax
- 2004.5-2005 Chevrolet Silverado 2500HD/3500HD 6.6L Duramax LLY
- 2004.5-2005 GMC Sierra 2500HD/3500HD 6.6L Duramax LLY
Vane Size Reference (Verify Before Ordering)
- 2003 Ford 6.0L Powerstroke (Early Production) – 15mm Vanes
- 2004.5-2005 GM 6.6L Duramax LLY – 15mm Vanes
- 2006-2007 Classic GM 6.6L Duramax LBZ – 13.2mm Vanes
- 2007.5-2010 GM 6.6L Duramax LMM – 12.2mm Vanes
- 2011-2016 GM 6.6L Duramax LML – 11.2mm Vanes
Important: This kit includes 15mm variable geometry turbo (VGT) vanes and is only compatible with turbochargers designed for the 15mm vane configuration. Garrett produced several GT37-series turbocharger variants with different vane heights throughout production. We strongly recommend verifying your turbocharger's vane size before ordering to ensure proper fitment.
Why Choose SWAG Performance?
At SWAG Performance, we build products that meet the demands of diesel enthusiasts, repair shops, and professional engine builders. Every component is selected for durability, precision fitment, and dependable performance to help keep your truck operating at its best. Whether you're restoring factory performance or rebuilding your turbocharger for years of reliable service, SWAG Performance delivers the quality you can trust.
