Check the listing for details. Used GM Duramax Tailpipe Extension - 4" Pipe - 5" Extension. Color: Silver, Condition: Used, Made in United States. Listed at 120.00 USD. Restore the appearance and performance of your vehicle with this used GM Duramax Tailpipe Extension. The 4-inch inlet diameter seamlessly connects to your exhaust system, while the 5-inch outlet diameter allows for a smooth and unobstructed flow of gases. Crafted from durable stainless steel, this extension is designed to withstand the rigors of daily driving and provide long-lasting reliability. The round shape and weld-on mounting style ensure a secure fit, making it a perfect choice for those who value both form and function in their ride. With its universal fitment, this tailpipe extension can be placed on the rear of your vehicle, giving it a sleek and customized look.Fits most 4" exhausts. Shipping to 48 contiguous states only.