Exhaust› Mufflers and Resonators

SPEC D TUNING

N1-style Universal Exhaust Muffler

$41.08

SKU: SPECDTUNING-MF-RS310

In Stock
In Stock
Ships by Sep 9
Free Shipping over $200
$100 Minimum Order
30 Days Return
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Overview

The Spec-D Tuning Apexi N1-style exhaust muffler is a universal muffler designed for performance.

It features a high-flow, straight-through design constructed from T-304 stainless steel, producing a sporty, deep tone. This muffler includes a removable silencer.
Show original supplier description
The Spec-D Tuning Apexi N1-style exhaust muffler is engineered for performance enthusiasts seeking an enhanced exhaust note. Its universal design allows for installation on a wide range of import and domestic vehicles, though specific fitment should always be verified. The high-flow, straight-through design is optimized to produce a sporty, deep, and solid tone, and it comes with a removable silencer to adjust the sound output. The dimensions are approximately 18" L x 5" W x 5" H, with a 2.5" inlet diameter and a 4" outlet diameter tip. This muffler is designed to increase performance by up to 10 horsepower. Professional installation is highly recommended due to the specialized nature of exhaust modifications. Fitment Industries notes that while this part is universal, it may not fit every vehicle entered in their system, and buyers should confirm compatibility before purchase. Some listings explicitly state "This Part Does Not Fit the Vehicle You Entered!", underscoring the importance of individual verification. Additionally, a California Proposition 65 warning is in effect, stating that this product may expose users to Nickel, a substance known to the State of California to cause cancer, birth defects, or other 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

BrandSPEC D TUNING
Part NumberSPECDTUNING-MF-RS310
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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