--- product_id: 276445621 title: "8042543 40 Series Chambered Muffler" brand: "flowmaster" price: "2435 zł" currency: PLN in_stock: true reviews_count: 5 category: "Flowmaster" url: https://www.desertcart.pl/products/276445621-8042543-40-series-chambered-muffler store_origin: PL region: Poland --- # Optimized for street, strip & off-road use Aggressive, yet refined exterior exhaust tone 409SS stainless steel, fully welded durability 8042543 40 Series Chambered Muffler **Brand:** flowmaster **Price:** 2435 zł **Availability:** ✅ In Stock ## Summary > 🔥 Unleash the beast within your ride with Flowmaster’s signature growl! ## Quick Answers - **What is this?** 8042543 40 Series Chambered Muffler by flowmaster - **How much does it cost?** 2435 zł with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.pl](https://www.desertcart.pl/products/276445621-8042543-40-series-chambered-muffler) ## Best For - flowmaster enthusiasts ## Why This Product - Trusted flowmaster brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Precision Fit & Finish:** 2.50 inch offset inlet/outlet design for seamless installation and optimal exhaust flow. - • **Built to Last with 409SS:** Premium fully welded stainless steel ensures unmatched durability and corrosion resistance for the long haul. - • **Balanced Sound Experience:** Noticeable interior resonance that’s sporty but never obnoxious—perfect for turning heads, not annoying neighbors. - • **Versatile Performance Ready:** Engineered for street, strip, and off-road applications—your truck’s new best friend in every terrain. - • **Command Attention with Every Rev:** Aggressive exterior exhaust tone delivers a powerful presence without overwhelming your daily drive. ## Overview The Flowmaster 8042543 40 Series Chambered Muffler features a fully welded 409 stainless steel construction for superior durability. Designed with a 2.50 inch offset inlet and outlet, it delivers an aggressive yet balanced exhaust tone ideal for street, strip, and off-road use. This muffler enhances engine sound presence without being intrusive, making it a top choice for enthusiasts seeking performance and style. ## Description Flow master 8042543 40 Series Muffler 409S - 2. 50 Offset IN / 2. 50 Offset OUT - Aggressive Sound Review: Installed this on my 07 F150 with the 5.4 v8, had to have a small section of 2.5 inch pipe welded in since this muffler is smaller than the stock muffler. Sounded pretty quiet at first but it's gotten louder over the past few weeks. It's not too loud that it will disturb your neighbors and make you the jackass of the neighbourhood, but it's loud enough that you can actually hear your engine when you step on it. Which is exactly what I wanted. Not annoying when you're cruising on the highway either. YouTube if you want to hear what it sounds like. Won't make your truck sound like a ferrari but will help it sound more like a truck. Review: Installed on my 2016 300c 3.6l with the rear muffler delete as well. Great sound and it doesn't sound like a cheap rally car wanna be import. Has a great sound on startup and idle. At first I was a little nervous hoping it wouldn't be too obnoxious but after the install I knew I made the right decision. Just enough to turn heads in a good way. Its a little loud in the cab at first startup but once warmed up its not bad. Steady, sporty hum at higher RPMs (2500-3500). It does resonate a little in the cab when accelerating but just briefly. At highway speeds you don't hear it at all. You do hear it a little when you are lugging the engine around 55-65 MPH in 8th gear but after that, it quiets down and you don't even hear it anymore until you get on it. Pair this with the Tazer and adding after market OEM paddle shifters, this will transform your 300c into a pretty fun ride. ## Features - Durable fully welded 409SS stainless steel - Aggressive Sound Exterior Exhaust Tone - Noticeable interior resonance - Excellent Street/Strip and Off Road application ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B002Q2PZCI | | Brand | Flowmaster | | Customer Reviews | 4.4 4.4 out of 5 stars (131) | | Date First Available | 18 August 2012 | | Exterior | Painted | | Item Weight | 4.51 Kilograms | | Item model number | 8042543 | | Manufacturer | Flowmaster | | Manufacturer Part Number | 8042543 | | Model | Flowmaster 8042543 40 Series Muffler 409S - 2.50 Offset IN / 2.50 Offset OUT - Aggressive Sound Black | | OEM Part Number | 8042543 | | Product Dimensions | 50.55 x 25.4 x 11.18 cm; 4.51 kg | ## Product Details - **Brand:** Flowmaster - **Item dimensions L x W x H:** 50.5 x 25.4 x 11.2 centimeters - **Item weight:** 4.51 kg - **Material:** Stainless Steel - **Shape:** Oval ## Images ![8042543 40 Series Chambered Muffler - Image 1](https://m.media-amazon.com/images/I/51N+eirlB0L.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Review *by Z***H on 10 January 2015* Installed this on my 07 F150 with the 5.4 v8, had to have a small section of 2.5 inch pipe welded in since this muffler is smaller than the stock muffler. Sounded pretty quiet at first but it's gotten louder over the past few weeks. It's not too loud that it will disturb your neighbors and make you the jackass of the neighbourhood, but it's loud enough that you can actually hear your engine when you step on it. Which is exactly what I wanted. Not annoying when you're cruising on the highway either. YouTube if you want to hear what it sounds like. Won't make your truck sound like a ferrari but will help it sound more like a truck. ### ⭐⭐⭐⭐⭐ Review *by A***R on 11 September 2022* Installed on my 2016 300c 3.6l with the rear muffler delete as well. Great sound and it doesn't sound like a cheap rally car wanna be import. Has a great sound on startup and idle. At first I was a little nervous hoping it wouldn't be too obnoxious but after the install I knew I made the right decision. Just enough to turn heads in a good way. Its a little loud in the cab at first startup but once warmed up its not bad. Steady, sporty hum at higher RPMs (2500-3500). It does resonate a little in the cab when accelerating but just briefly. At highway speeds you don't hear it at all. You do hear it a little when you are lugging the engine around 55-65 MPH in 8th gear but after that, it quiets down and you don't even hear it anymore until you get on it. Pair this with the Tazer and adding after market OEM paddle shifters, this will transform your 300c into a pretty fun ride. ### ⭐⭐⭐⭐⭐ Review *by M***E on 15 August 2014* Installed on a Dodge Dakota 2002 4.7L quadcab. It sounds fantastic. Moderate interior noise while accelerating around 1500-2000 rpm. Which sounds so good its not loud just a good drone. Once up to speed 55mph you can hear it rumbling but not any louder then the wind noise. IMPORTANT Keep in mind this is not a direct fit you will have to have a 12" piece of pipe (2.5in I.D. on one end and 2.5in O.D. on the other end of said pipe.) My friend has a Dakota with a 5.2L with a SUPER 40 series which has almost no interior noise and not quite as loud at idle. --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.pl/products/276445621-8042543-40-series-chambered-muffler](https://www.desertcart.pl/products/276445621-8042543-40-series-chambered-muffler) --- *Product available on Desertcart Poland* *Store origin: PL* *Last updated: 2026-06-03*