---
product_id: 426079760
title: "JY PERFORMANCE 4\" Inch Inlet Diesel Muffler Exhaust - 7\" x 24\" Body - 30\" OAL - Straight Through - Stainless Steel - Welded On Resonator, Polished - TIG Welding"
brand: "jy performance"
price: "A$508"
currency: AUD
in_stock: true
url: https://www.desertcart.com.au/products/426079760-jy-performance-4-inch-inlet-diesel-muffler-exhaust-7-x
store_origin: AU
region: Australia
---

# Polished stainless steel finish 4" inlet/outlet precision fit TIG welded for ultimate durability JY PERFORMANCE 4" Inch Inlet Diesel Muffler Exhaust - 7" x 24" Body - 30" OAL - Straight Through - Stainless Steel - Welded On Resonator, Polished - TIG Welding

**Brand:** jy performance
**Price:** A$508
**Availability:** ✅ In Stock

## Summary

> 🔥 Elevate your diesel game with power, style, and unmatched durability!

## Quick Answers

- **What is this?** JY PERFORMANCE 4" Inch Inlet Diesel Muffler Exhaust - 7" x 24" Body - 30" OAL - Straight Through - Stainless Steel - Welded On Resonator, Polished - TIG Welding by jy performance
- **How much does it cost?** A$508 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.au](https://www.desertcart.com.au/products/426079760-jy-performance-4-inch-inlet-diesel-muffler-exhaust-7-x)

## Best For

- jy performance enthusiasts

## Why This Product

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

## Key Features

- • **Throaty Diesel Roar:** Engineered to deliver a rich, aggressive sound that commands attention on the road
- • **Precision Fit & Finish:** 4" inlet/outlet with a sleek 7" round body polished to perfection for a premium look
- • **Built to Last a Lifetime:** 100% TIG welded stainless steel resists rust and wear, ensuring relentless durability
- • **Resonance Control Mastery:** Welded-on resonator absorbs unwanted interior noise for a smooth, refined exhaust tone
- • **Unmatched Flow Efficiency:** Straight-through design slashes back pressure for peak engine performance

## Overview

The JY PERFORMANCE 4" Diesel Muffler features a 30" overall length with a 7" polished stainless steel body, designed for straight-through exhaust flow. TIG welded for superior strength and rust resistance, it delivers enhanced engine performance with reduced back pressure and a rich, throaty sound, while its welded resonator minimizes interior resonance for a refined driving experience.

## Description

Muffler Specifications: Straight-through flow path Directional flow, non-reversible Superior Flow and Rich, Throaty Sound 100% welded design for long-lasting durability Stainless steel construction for lifelong protection Internal stainless steel mesh & fiberglass construction Straight-through design does not restrict exhaust flow and helps cut back pressure

## Features

- Inlet: 4" ID (Inner Diameter) - Outlet: 4" ID (Inner Diameter) - Overall Length: 30" - Body Length: 24" - Body Type: 7" Round - Style. No Inlet or Outlet Difference.
- Straight Through with TIG Welding Design
- Stainless Steel Construction for Long-Lasting and Anti-Rust
- Absorbs Unwanted Interior Resonance,
- Body with Polish Surface Finished

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Manufacturer | JY PERFORMANCE |
| Brand | JY PERFORMANCE |
| Model | DIESEL MUFFLER |
| Product Dimensions | 78.74 x 20.32 x 20.32 cm; 4.54 kg |
| Item model number | DAC187 |
| Exterior | Polished |
| Manufacturer Part Number | DAC187 |
| Special Features | Straight Through Diesel Muffler |
| Item Weight | 4.54 Kilograms |

## Product Details

- **Brand:** JY PERFORMANCE
- **Material:** Stainless Steel
- **Item dimensions L x W x H:** 78.7 x 20.3 x 20.3 centimeters
- **Vehicle service type:** Truck
- **Item weight:** 4.54 kg

## Images

![JY PERFORMANCE 4" Inch Inlet Diesel Muffler Exhaust - 7" x 24" Body - 30" OAL - Straight Through - Stainless Steel - Welded On Resonator, Polished - TIG Welding - Image 1](https://m.media-amazon.com/images/I/61k8I2F4d8L.jpg)
![JY PERFORMANCE 4" Inch Inlet Diesel Muffler Exhaust - 7" x 24" Body - 30" OAL - Straight Through - Stainless Steel - Welded On Resonator, Polished - TIG Welding - Image 2](https://m.media-amazon.com/images/I/61DmZnUVu1L.jpg)
![JY PERFORMANCE 4" Inch Inlet Diesel Muffler Exhaust - 7" x 24" Body - 30" OAL - Straight Through - Stainless Steel - Welded On Resonator, Polished - TIG Welding - Image 3](https://m.media-amazon.com/images/I/618oTqveRwL.jpg)
![JY PERFORMANCE 4" Inch Inlet Diesel Muffler Exhaust - 7" x 24" Body - 30" OAL - Straight Through - Stainless Steel - Welded On Resonator, Polished - TIG Welding - Image 4](https://m.media-amazon.com/images/I/61yyVM6qzgL.jpg)
![JY PERFORMANCE 4" Inch Inlet Diesel Muffler Exhaust - 7" x 24" Body - 30" OAL - Straight Through - Stainless Steel - Welded On Resonator, Polished - TIG Welding - Image 5](https://m.media-amazon.com/images/I/71U1-k5wuGL.jpg)

## Available Options

This product comes in different **Size** options.

## Questions & Answers

**Q: Is this a clamp on or weld on?**
A: It could be. Normally I use a 5 inch ss band clamp.

**Q: I have a horrible drone sound around 2000 rpm and currently have a shorter 5" straight through muffler on my 3500. diesel truck.  Looking to just tow.**
A: The JY quieted my Ram 2500 Cummins diesel exhaust to a tolerable level. It is NOT a muffler, more like an expansion chamber or resonator. It does work to reduce sound, but not like a muffler.

**Q: Can this fit on a 2011 Freightliner Cascadia**
A: I suppose you can fit it in their it would need some customizing  i put a similar 5 incher on a freightshaker the one i used i got from summit racing and was originally for a diesel pickup but works great sounds awesome  and is holding up well

**Q: Will this muffler passed inspection?  pennsylvania is cracking down on that and i need a muffer asap on my 5" exhaust.  thanks in advance.**
A: I’m not familiar with Pennsylvania inspection laws; we live in Tennessee

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*Product available on Desertcart Australia*
*Store origin: AU*
*Last updated: 2026-03-04*