Wehrli 3in Stainless Downpipe — Fits 2004.5-2010 Chevy/GMC 6.6L LLY/LBZ/LMM Duramax

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Car Wheel Size Chart

Wheel Diameter (inches) Tire Width (mm) Aspect Ratio Rim Width (inches)
14185655.5
15195606.0
16205556.5
17215507.0
18225457.5
19235408.0
20245358.5

Note: Wheel and tire sizes vary by car make and model. Always consult your vehicle’s manufacturer for exact specifications.

How to Read Tire Size

Example: 225/45R17 means:

  • 225 = Tire width in mm
  • 45 = Aspect ratio (height as % of width)
  • R17 = Rim diameter in inches

Product Details

Product Description
Part Numbers
Sizing & Fit

About Wehrli

Wehrli engineers high-quality automotive parts and accessories trusted by enthusiasts and shops across North America. At GGCRACING we stock the full Wehrli lineup with fast shipping and expert fitment support — order with confidence.

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Upgrade Your Duramax Exhaust with the Wehrli 3in Stainless Downpipe

Enhance the performance and sound of your 2004.5-2010 Chevrolet Silverado/GMC Sierra 2500HD/3500HD equipped with the 6.6L LLY, LBZ, or LMM Duramax engine. This Wehrli 3-inch Stainless Steel Downpipe is designed to optimize exhaust gas flow, leading to noticeable improvements in performance and efficiency.

Why Choose the Wehrli Downpipe?

  • Improved Exhaust Flow: The larger 3-inch diameter and smooth mandrel bends reduce backpressure, allowing exhaust gases to exit the turbocharger more efficiently.
  • Enhanced Performance: Experience quicker turbo spool-up, increased horsepower, and improved throttle response due to better exhaust scavenging.
  • Durable Stainless Steel Construction: Crafted from high-quality stainless steel for superior corrosion resistance and longevity, ensuring it withstands the rigors of daily driving and demanding conditions.
  • Aggressive Sound: Contributes to a deeper, more aggressive exhaust note, enhancing the auditory experience of your Duramax truck.
  • Direct Fit Design: Engineered for a precise fitment on 2004.5-2010 Chevrolet and GMC trucks with the 6.6L LLY, LBZ, and LMM Duramax engines.

This downpipe is an essential upgrade for any Duramax owner looking to extract more power and improve the overall performance of their vehicle. Invest in quality and performance with the Wehrli 3-inch Stainless Steel Downpipe, available at GGCRACING.

Vehicle Fitment

Years Make Model Trim
2004-2005 Chevrolet Silverado 2500 HD Base
2005-2006 Chevrolet Silverado 2500 HD LS
2005-2010 Chevrolet Silverado 2500 HD LT
2006-2010 Chevrolet Silverado 2500 HD WT
2007-2010 Chevrolet Silverado 2500 HD LTZ
2007 Chevrolet Silverado 2500 HD Classic LT
2007 Chevrolet Silverado 2500 HD Classic WT
2004 Chevrolet Silverado 3500 WT
2004-2005 Chevrolet Silverado 3500 Base
2004-2006 Chevrolet Silverado 3500 LS
2004-2006 Chevrolet Silverado 3500 LT
2007 Chevrolet Silverado 3500 Classic LS
2007 Chevrolet Silverado 3500 Classic LT
2007 Chevrolet Silverado 3500 Classic WT
2007-2010 Chevrolet Silverado 3500 HD LT
2007-2010 Chevrolet Silverado 3500 HD LTZ
2007-2010 Chevrolet Silverado 3500 HD WT
2004-2010 GMC Sierra 2500 HD SLE
2004-2010 GMC Sierra 2500 HD SLT
2004-2010 GMC Sierra 2500 HD WT
2006 GMC Sierra 2500 HD SL
2007 GMC Sierra 2500 HD Classic SL
2007 GMC Sierra 2500 HD Classic SLE
2007 GMC Sierra 2500 HD Classic SLT
2004-2005 GMC Sierra 3500 Base
2004-2006 GMC Sierra 3500 SLE
2004-2006 GMC Sierra 3500 SLT
2004-2006 GMC Sierra 3500 WT
2006 GMC Sierra 3500 SL
2007 GMC Sierra 3500 Classic SL
2007 GMC Sierra 3500 Classic SLE
2007 GMC Sierra 3500 Classic SLT
2007-2010 GMC Sierra 3500 HD SLE
2007-2010 GMC Sierra 3500 HD SLT
2007-2010 GMC Sierra 3500 HD WT

Product Details

Product Description
Part Numbers
Sizing & Fit

About Wehrli

Wehrli engineers high-quality automotive parts and accessories trusted by enthusiasts and shops across North America. At GGCRACING we stock the full Wehrli lineup with fast shipping and expert fitment support — order with confidence.

Watch in action

Upgrade Your Duramax Exhaust with the Wehrli 3in Stainless Downpipe

Enhance the performance and sound of your 2004.5-2010 Chevrolet Silverado/GMC Sierra 2500HD/3500HD equipped with the 6.6L LLY, LBZ, or LMM Duramax engine. This Wehrli 3-inch Stainless Steel Downpipe is designed to optimize exhaust gas flow, leading to noticeable improvements in performance and efficiency.

Why Choose the Wehrli Downpipe?

  • Improved Exhaust Flow: The larger 3-inch diameter and smooth mandrel bends reduce backpressure, allowing exhaust gases to exit the turbocharger more efficiently.
  • Enhanced Performance: Experience quicker turbo spool-up, increased horsepower, and improved throttle response due to better exhaust scavenging.
  • Durable Stainless Steel Construction: Crafted from high-quality stainless steel for superior corrosion resistance and longevity, ensuring it withstands the rigors of daily driving and demanding conditions.
  • Aggressive Sound: Contributes to a deeper, more aggressive exhaust note, enhancing the auditory experience of your Duramax truck.
  • Direct Fit Design: Engineered for a precise fitment on 2004.5-2010 Chevrolet and GMC trucks with the 6.6L LLY, LBZ, and LMM Duramax engines.

This downpipe is an essential upgrade for any Duramax owner looking to extract more power and improve the overall performance of their vehicle. Invest in quality and performance with the Wehrli 3-inch Stainless Steel Downpipe, available at GGCRACING.

Vehicle Fitment

Years Make Model Trim
2004-2005 Chevrolet Silverado 2500 HD Base
2005-2006 Chevrolet Silverado 2500 HD LS
2005-2010 Chevrolet Silverado 2500 HD LT
2006-2010 Chevrolet Silverado 2500 HD WT
2007-2010 Chevrolet Silverado 2500 HD LTZ
2007 Chevrolet Silverado 2500 HD Classic LT
2007 Chevrolet Silverado 2500 HD Classic WT
2004 Chevrolet Silverado 3500 WT
2004-2005 Chevrolet Silverado 3500 Base
2004-2006 Chevrolet Silverado 3500 LS
2004-2006 Chevrolet Silverado 3500 LT
2007 Chevrolet Silverado 3500 Classic LS
2007 Chevrolet Silverado 3500 Classic LT
2007 Chevrolet Silverado 3500 Classic WT
2007-2010 Chevrolet Silverado 3500 HD LT
2007-2010 Chevrolet Silverado 3500 HD LTZ
2007-2010 Chevrolet Silverado 3500 HD WT
2004-2010 GMC Sierra 2500 HD SLE
2004-2010 GMC Sierra 2500 HD SLT
2004-2010 GMC Sierra 2500 HD WT
2006 GMC Sierra 2500 HD SL
2007 GMC Sierra 2500 HD Classic SL
2007 GMC Sierra 2500 HD Classic SLE
2007 GMC Sierra 2500 HD Classic SLT
2004-2005 GMC Sierra 3500 Base
2004-2006 GMC Sierra 3500 SLE
2004-2006 GMC Sierra 3500 SLT
2004-2006 GMC Sierra 3500 WT
2006 GMC Sierra 3500 SL
2007 GMC Sierra 3500 Classic SL
2007 GMC Sierra 3500 Classic SLE
2007 GMC Sierra 3500 Classic SLT
2007-2010 GMC Sierra 3500 HD SLE
2007-2010 GMC Sierra 3500 HD SLT
2007-2010 GMC Sierra 3500 HD WT

Product Details

Product Description

About Wehrli

Wehrli engineers high-quality automotive parts and accessories trusted by enthusiasts and shops across North America. At GGCRACING we stock the full Wehrli lineup with fast shipping and expert fitment support — order with confidence.

Watch in action

Upgrade Your Duramax Exhaust with the Wehrli 3in Stainless Downpipe

Enhance the performance and sound of your 2004.5-2010 Chevrolet Silverado/GMC Sierra 2500HD/3500HD equipped with the 6.6L LLY, LBZ, or LMM Duramax engine. This Wehrli 3-inch Stainless Steel Downpipe is designed to optimize exhaust gas flow, leading to noticeable improvements in performance and efficiency.

Why Choose the Wehrli Downpipe?

  • Improved Exhaust Flow: The larger 3-inch diameter and smooth mandrel bends reduce backpressure, allowing exhaust gases to exit the turbocharger more efficiently.
  • Enhanced Performance: Experience quicker turbo spool-up, increased horsepower, and improved throttle response due to better exhaust scavenging.
  • Durable Stainless Steel Construction: Crafted from high-quality stainless steel for superior corrosion resistance and longevity, ensuring it withstands the rigors of daily driving and demanding conditions.
  • Aggressive Sound: Contributes to a deeper, more aggressive exhaust note, enhancing the auditory experience of your Duramax truck.
  • Direct Fit Design: Engineered for a precise fitment on 2004.5-2010 Chevrolet and GMC trucks with the 6.6L LLY, LBZ, and LMM Duramax engines.

This downpipe is an essential upgrade for any Duramax owner looking to extract more power and improve the overall performance of their vehicle. Invest in quality and performance with the Wehrli 3-inch Stainless Steel Downpipe, available at GGCRACING.

Vehicle Fitment

Years Make Model Trim
2004-2005 Chevrolet Silverado 2500 HD Base
2005-2006 Chevrolet Silverado 2500 HD LS
2005-2010 Chevrolet Silverado 2500 HD LT
2006-2010 Chevrolet Silverado 2500 HD WT
2007-2010 Chevrolet Silverado 2500 HD LTZ
2007 Chevrolet Silverado 2500 HD Classic LT
2007 Chevrolet Silverado 2500 HD Classic WT
2004 Chevrolet Silverado 3500 WT
2004-2005 Chevrolet Silverado 3500 Base
2004-2006 Chevrolet Silverado 3500 LS
2004-2006 Chevrolet Silverado 3500 LT
2007 Chevrolet Silverado 3500 Classic LS
2007 Chevrolet Silverado 3500 Classic LT
2007 Chevrolet Silverado 3500 Classic WT
2007-2010 Chevrolet Silverado 3500 HD LT
2007-2010 Chevrolet Silverado 3500 HD LTZ
2007-2010 Chevrolet Silverado 3500 HD WT
2004-2010 GMC Sierra 2500 HD SLE
2004-2010 GMC Sierra 2500 HD SLT
2004-2010 GMC Sierra 2500 HD WT
2006 GMC Sierra 2500 HD SL
2007 GMC Sierra 2500 HD Classic SL
2007 GMC Sierra 2500 HD Classic SLE
2007 GMC Sierra 2500 HD Classic SLT
2004-2005 GMC Sierra 3500 Base
2004-2006 GMC Sierra 3500 SLE
2004-2006 GMC Sierra 3500 SLT
2004-2006 GMC Sierra 3500 WT
2006 GMC Sierra 3500 SL
2007 GMC Sierra 3500 Classic SL
2007 GMC Sierra 3500 Classic SLE
2007 GMC Sierra 3500 Classic SLT
2007-2010 GMC Sierra 3500 HD SLE
2007-2010 GMC Sierra 3500 HD SLT
2007-2010 GMC Sierra 3500 HD WT

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