---
product_id: 81801842
title: "40842S Specialty Universal Performance Muffler 2.5\" Center Inlet / 2.5\" Center Outlet 5\" Round x 10\" Long Body 15\" Overall Length Un-Notched Necks Reversible Design T-304 Stainless Steel"
brand: "borla"
price: "$430.32"
currency: USD
in_stock: true
reviews_count: 13
category: "Borla"
url: https://www.desertcart.us/products/81801842-40842s-specialty-universal-performance-muffler-2-5-center-inlet-2
store_origin: US
region: United States of America
---

# Multi-Core Tech - Boosts Horsepower & Flow T-304 Stainless Steel - Ultimate Durability Bolt-On Installation - Easy, No-Fuss Setup 40842S Specialty Universal Performance Muffler 2.5" Center Inlet / 2.5" Center Outlet 5" Round x 10" Long Body 15" Overall Length Un-Notched Necks Reversible Design T-304 Stainless Steel

**Brand:** borla
**Price:** $430.32
**Availability:** ✅ In Stock

## Summary

> 🔥 Unleash the roar, own the road with Borla power!

## Quick Answers

- **What is this?** 40842S Specialty Universal Performance Muffler 2.5" Center Inlet / 2.5" Center Outlet 5" Round x 10" Long Body 15" Overall Length Un-Notched Necks Reversible Design T-304 Stainless Steel by borla
- **How much does it cost?** $430.32 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/81801842-40842s-specialty-universal-performance-muffler-2-5-center-inlet-2)

## Best For

- borla enthusiasts

## Why This Product

- Trusted borla brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Made in the USA:** Proudly manufactured domestically, ensuring top-tier quality and craftsmanship.
- • **Effortless Upgrade:** Bolt-on installation with un-notched necks designed for seamless weld-in or clamp-on fitment.
- • **Signature Deep Tone:** Delivers a smooth, authoritative exhaust note with minimal drone—perfect balance of power and refinement.
- • **Race-Ready Durability:** Crafted from premium T-304 stainless steel for unmatched corrosion resistance and longevity.
- • **Power & Efficiency Boost:** Multi-core internal design maximizes exhaust flow, enhancing horsepower and fuel economy.

## Overview

The BORLA 40842S Specialty Universal Performance Muffler is a precision-engineered exhaust upgrade featuring T-304 stainless steel construction and advanced multi-core technology. Designed for 2.5" inlet/outlet pipes, it offers bolt-on installation flexibility with un-notched necks for weld or clamp fitment. This muffler enhances horsepower, improves fuel efficiency, and delivers a deep, race-inspired tone with minimal cabin drone. Made in the USA, it’s the go-to choice for professionals seeking durable, high-performance exhaust solutions.

## Description

Borla S-Type Mufflers are engineered to provide excellent exhaust emission and internal power generation. These mufflers feature a multi-core technology and are manufactured from T-304 stainless steel which offers long lasting durability. They are equipped with ultra-smooth mandrel bends ensuring maximum flow and power. These mufflers provide brilliant fuel economy and increase horsepower efficiently. They are corrosion resistant and ensure easy installation.

Review: Sounds awesome on my 2013 F150 5.0!!! - Received this muffler today and it sounds awesome on my 2013 F150 5.0. I pulled the resonator and muffler assembly down and chopped off the ball flange connected to the resonator. I installed a 2.5" to 2.5" slip coupler and 2.5" straight pipe back to the original location of the oem muffler. Chopped off the tail pipe at the muffler exit and then cut the hangers off. refitted the hangers and marked the pipe. I installed a 2.5" to 3" adapter. on the tail pipe inlet. Pulled it all back down and welded all the connections except the inlet and outlet of the of where the muffler will slip into. rehung the system and slipped the Borla on. installed 2 exhaust clamps(could not weld the muffler in place at that time as the Borla is stainless steel(need a tig welder for that). Started it up cold and it went from mild to wild. Man it sounds awesome, nice rumble at idle upon start-up. Once it idled down a bit after start-up it became more tame, but you could definitely hear it. Entering the freeway it really open up and barks. This little muffler has a hell of a bark. Sounds like a race car. If your in doubt, try it with the resonator on. I was worried that it would annoy my neighbors early in the morning but it's not bad at all til you open her up. Hope this helps anyone looking at one of these. **Update** I ended up putting the factory resonator. Ask on as the drone was teeth chattering between 1500-2000 rpm. Had it all welded up and now it's quiet in cab(like stock exhaust) but outside sounds great. After putting the resonator back on its a little bit quieter but sounds much better than stock. Plus, it will get louder as it breaks in.
Review: My go-to muffler for no/low drone and deep tone - I had these on my 03 4.6 Mustang GT for a while, and they sounded so good I bought another set for my 83 305 el Camino. They have a smooth deep authoritative tone. I’m interested is what they would sound like on a smaller displacement engine. 0 drone on my mustang, and I have a slight drone on my el coe around 900 rpm… which you are rarely at except for maybe traffic. At lower RPS (1.5k - 2.5k) they have a deep meaty tone, and at higher rpms (3k+) they have a more crips and refined roar. Despite being a straight through bullet style muffler, they’re not too loud and the tone isn’t obnoxious.

## Features

- T-304 Stainless Steel
- Bolt On Installation
- All Welded Construction
- Made In USA
- Un-Notched necks are designed for weld in installation. If clamping, use 3" wide band clamp 18004.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0018JDG0I |
| Best Sellers Rank | #1,017,073 in Automotive ( See Top 100 in Automotive ) #658 in Powersports Silencers & Mufflers |
| Brand | Borla |
| Customer Reviews | 4.7 4.7 out of 5 stars (246) |
| Date First Available | October 19, 2006 |
| Exterior | Painted |
| Global Trade Identification Number | 00808422408424 |
| Inlet Connection Size | 2.5 Inches |
| Is Discontinued By Manufacturer | No |
| Item Weight | 5.9 pounds |
| Item model number | 40842S |
| Manufacturer | BORLA |
| Manufacturer Part Number | 40842S |
| Model | Borla 40842S |
| OEM Part Number | 40842S |
| Shape | Round |
| UPC | 808422408424 |
| Vehicle Service Type | Car |

## Product Details

- **Brand:** Borla
- **Item Weight:** 5.9 Pounds
- **Material:** Stainless Steel
- **Shape:** Round
- **Vehicle Service Type:** Car

## Images

![40842S Specialty Universal Performance Muffler 2.5" Center Inlet / 2.5" Center Outlet 5" Round x 10" Long Body 15" Overall Length Un-Notched Necks Reversible Design T-304 Stainless Steel - Image 1](https://m.media-amazon.com/images/I/51hCHTPIfZL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Sounds awesome on my 2013 F150 5.0!!!
*by B***R on April 11, 2015*

Received this muffler today and it sounds awesome on my 2013 F150 5.0. I pulled the resonator and muffler assembly down and chopped off the ball flange connected to the resonator. I installed a 2.5" to 2.5" slip coupler and 2.5" straight pipe back to the original location of the oem muffler. Chopped off the tail pipe at the muffler exit and then cut the hangers off. refitted the hangers and marked the pipe. I installed a 2.5" to 3" adapter. on the tail pipe inlet. Pulled it all back down and welded all the connections except the inlet and outlet of the of where the muffler will slip into. rehung the system and slipped the Borla on. installed 2 exhaust clamps(could not weld the muffler in place at that time as the Borla is stainless steel(need a tig welder for that). Started it up cold and it went from mild to wild. Man it sounds awesome, nice rumble at idle upon start-up. Once it idled down a bit after start-up it became more tame, but you could definitely hear it. Entering the freeway it really open up and barks. This little muffler has a hell of a bark. Sounds like a race car. If your in doubt, try it with the resonator on. I was worried that it would annoy my neighbors early in the morning but it's not bad at all til you open her up. Hope this helps anyone looking at one of these. **Update** I ended up putting the factory resonator. Ask on as the drone was teeth chattering between 1500-2000 rpm. Had it all welded up and now it's quiet in cab(like stock exhaust) but outside sounds great. After putting the resonator back on its a little bit quieter but sounds much better than stock. Plus, it will get louder as it breaks in.

### ⭐⭐⭐⭐⭐ My go-to muffler for no/low drone and deep tone
*by C***E on October 25, 2024*

I had these on my 03 4.6 Mustang GT for a while, and they sounded so good I bought another set for my 83 305 el Camino. They have a smooth deep authoritative tone. I’m interested is what they would sound like on a smaller displacement engine. 0 drone on my mustang, and I have a slight drone on my el coe around 900 rpm… which you are rarely at except for maybe traffic. At lower RPS (1.5k - 2.5k) they have a deep meaty tone, and at higher rpms (3k+) they have a more crips and refined roar. Despite being a straight through bullet style muffler, they’re not too loud and the tone isn’t obnoxious.

### ⭐⭐⭐⭐⭐ No regrets except not buying sooner
*by C***A on December 6, 2017*

Good quality. Actual stainless steel, unlike most cheap or knockoff Chinese made exhaust components. The tone is a spectacular throaty growl. You get a nice subdued popping, crackling sound when decelerating from high rpm and staying in gear. Went on a 05 f150 with the 4.2. love the sound. Very refined but still aggressive. Like a pet tiger. I was going to just do a glasspack from a cheap company, but after listening to about 100 different exhaust videos on YouTube, this one stood out far above everything else. The only downside is the cost. It's a lot of money for a straight through muffler. You do also get kind of a harmonic effect at certain rpms under load. I like them, but someone looking for a close to factory sound would not. Conversation is possible in the cab, but you do have to speak a little louder.

## Frequently Bought Together

- BORLA 40842S Specialty Universal Performance Muffler 2.5" Center Inlet / 2.5" Center Outlet 5" Round x 10" Long Body 15" Overall Length Un-Notched Necks Reversible Design T-304 Stainless Steel
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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-03-02*