4 inch T409 Stainless Adapter Exhaust Pipe

Features:

• Fits 2006-2007 6.6L Duramax LBZ engines
• For Silverado/Sierra 2500HD and 3500HD
• 4-inch diameter adapter pipe
• Made from T409 stainless steel
• Corrosion-resistant for long-lasting durability
• Improves exhaust flow and performance
• Perfect for custom exhaust setups
• Designed for regular cab models
• Engineered for a perfect fit
• Helps unlock your truck’s full potential

Step Up Your LBZ’s Exhaust Game

If you’re the type of truck owner who isn’t satisfied with average performance, the MBRP GMS9423 4-Inch T409 Stainless Adapter Pipe is exactly what you need to push your 2006–2007 Silverado or Sierra 2500HD/3500HD 6.6L Duramax LBZ to the next level. Designed specifically for regular cab models, this 4-inch adapter pipe helps improve exhaust flow by replacing restrictive factory components with a smoother, larger-diameter transition. The result is better breathing for your Duramax, which can help support performance upgrades and deliver a more aggressive exhaust note. Whether you’re looking to enhance towing power or simply fine-tune your exhaust setup, this pipe offers the perfect foundation to get started.

Built for Performance and Long-Term Durability

MBRP builds this adapter pipe from high-quality T409 stainless steel, giving it excellent resistance to corrosion and the elements. That means you can count on it to hold up to everything from daily driving to harsh winter conditions or off-road abuse. It’s engineered for a precise fit, so you can install it with confidence as part of a custom or aftermarket exhaust system. If you’re serious about getting the most out of your LBZ-powered truck, this MBRP adapter pipe is a smart, reliable upgrade that helps unlock the potential your Duramax was built to deliver.

Fits: 2006, 2007 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LBZ Regular Cab