Exhaust› Mufflers and Resonators

Nascar

3-1/2" Whelen Modified Spec Muffler

$126.99

SKU: QCN350

In Stock
In Stock
Ships by Sep 12
Free Shipping over $200
$100 Minimum Order
30 Days Return
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Overview

The Nascar QCN350 is a 3-1/2" NASCAR Whelen Modified Spec Muffler. It features a polished stainless steel construction and a Quad-Core Style Directional Muffler design.

The muffler has an 8-inch long body, with an overall length of 16 inches. It measures 5 inches in body outside diameter, with a 3-1/2 inch inside diameter inlet and a 3-1/2 inch outside diameter outlet. This muffler is sold individually.
Show original supplier description
The Nascar QCN350 is a 3-1/2" NASCAR Whelen Modified Spec Muffler, designed for high-performance applications. Constructed from polished stainless steel, this muffler features a Quad-Core Style Directional Muffler design for optimal exhaust flow and sound. Its specifications include an 8-inch long body, a 16-inch overall length, a 5-inch body outside diameter, a 3-1/2 inch inside diameter inlet, and a 3-1/2 inch outside diameter outlet. The QCN350 is sold individually. This product is built to order in North Carolina with an estimated ship window of 4-6 weeks. Buyers needing the muffler sooner are advised to call the manufacturer or find an authorized dealer with inventory. The manufacturer also provides a warning that this product can expose users to chemicals like Chromium and Nickel, which are known to the State of California to cause cancer, birth defects, or reproductive harm.

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Fitment

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Specifications

BrandNascar
Part NumberQCN350
CategoryExhaust

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Returns & Fitment

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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Shipping

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

Free shipping over $200 in the continental US. Alaska, Hawaii, U.S. territories (Puerto Rico, U.S. Virgin Islands, Guam, American Samoa, and the Northern Mariana Islands), and international orders carry surcharges — most appear at checkout. Some exceptions (LTL freight, or suppliers who quote freight only after we place the order) won’t. In those cases we’ll reach out with the exact charge before your order moves forward.

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