--- product_id: 1324759 title: "42541 40 Series Muffler - 2.50 Offset In and 2.50 Center Out - Aggressive Sound" brand: "flowmaster" price: "฿12234" currency: THB in_stock: true reviews_count: 13 category: "Flowmaster" url: https://www.desertcart.co.th/products/1324759-42541-40-series-muffler-2-50-offset-in-and-2 store_origin: TH region: Thailand --- # Aggressive, signature bark Boosts horsepower & torque 16-gauge aluminized steel durability 42541 40 Series Muffler - 2.50 Offset In and 2.50 Center Out - Aggressive Sound **Brand:** flowmaster **Price:** ฿12234 **Availability:** ✅ In Stock ## Summary > 🔥 Own the street with the iconic roar of Flowmaster’s 40 Series! ## Quick Answers - **What is this?** 42541 40 Series Muffler - 2.50 Offset In and 2.50 Center Out - Aggressive Sound by flowmaster - **How much does it cost?** ฿12234 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.th](https://www.desertcart.co.th/products/1324759-42541-40-series-muffler-2-50-offset-in-and-2) ## 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 - • **Built to Endure:** 16-gauge aluminized steel and MIG-welded construction for relentless heat and vibration resistance. - • **No Compromise Longevity:** No internal packing to wear out—consistent performance mile after mile. - • **Performance-Driven Design:** Optimized airflow reduces back pressure, unlocking horsepower and torque gains. - • **Universal Fit, Custom Ready:** Versatile inlet/outlet configurations fit muscle cars, trucks, SUVs, and custom builds effortlessly. - • **Unmistakable Aggressive Sound:** Turn heads with Flowmaster’s legendary two-chambered roar that commands the street. ## Overview The Flowmaster 40 Series Original Chambered Muffler delivers a bold, aggressive exhaust tone with its classic two-chambered design. Crafted from durable 16-gauge aluminized steel and fully MIG-welded, it enhances horsepower and torque by improving airflow and reducing back pressure. Designed for universal fitment, it’s perfect for muscle cars, street rods, trucks, SUVs, and custom builds seeking legendary sound and proven performance. ## Description Product description Flowmaster – Classic Performance Sound & Tone Most Aggressive Sound Built for Maximum Performance Loudest Flowmaster muffler. Compact single-chamber design with an open-pipe tone. Signature Sound The Original Flowmaster Sound Bold, unmistakable muscle-car tone. Delivers classic Flowmaster performance sound. Deep, Aggressive Tone The Deepest Flowmaster Sound Compact, powerful design with Delta Flow tech. Delivers rich, aggressive street tone. Straight-Through Design Refined Sound, Everyday Drive Affordable straight-through muffler with a deep, mellow tone for modern cars and daily drivers. Delta Flow Design Performance Sound, Everyday Comfort Three-chamber design with Delta Flow tech delivers power, performance, and a mellow tone. Flowmaster Mufflers - Most Popular Mufflers Sound Find Your Flowmaster Sound Super 10 Series Origina 40 Series Super 44 Series Super 40 Series Flow FX Review: 👌 - Put this on my wife's jeep commander with the 5.7 hemi. It sounds great Review: Sounds great, dented both mufflers in in shipping - Flowmasters are good, both mufflers were dented pre desertcart packaging I believe, they are going on a 50k show car and need them for the car show this weekend, no time to return or exchange. Pretty disappointed in packaging and shipping. Flowmasters are good sounding parts, nothing to complain on the brand itself. 1970 mustang, with a built 351C, gives it the classic muscle car sound, will be hitting the dyno next week to see if I loose or gain any HP ## Features - LEGENDARY SOUND: This is the original Flowmaster muffler that enthusiasts know and love! Famous for its bold, aggressive bark and signature tone. It delivers the unmistakable attitude and street presence that made Flowmaster a legend. - TWO-CHAMBERED INTERNAL DESIGN: Flowmaster’s classic two-chambered layout delivers that bold, aggressive exhaust sound Flowmaster is known for. Perfect for muscle cars, street rods, trucks, off-road rigs, and custom builds. - PROVEN PERFORMANCE: Enhances airflow and reduces back pressure to help boost horsepower, torque, and throttle response. - BUILT TO LAST: Made from 16-gauge aluminized steel and fully MIG-welded to withstand high heat and vibration with no internal packing to blow out or wear down. - UNIVERSAL FITMENT: Designed for custom and modified exhaust systems, with multiple inlet/outlet sizes and configurations (center/offset, dual) for simplified installation and optimal fit. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B000182DMO | | Automotive Fit Type | Universal Fit | | Best Sellers Rank | #20,491 in Automotive ( See Top 100 in Automotive ) #4 in Automotive Performance Exhaust Mufflers #192 in Automotive Emission & Exhaust Products | | Brand | Flowmaster | | Brand Name | Flowmaster | | Compatible with Vehicle Type | Car | | Configuration | Center/Offset | | Customer Reviews | 4.8 out of 5 stars 411 Reviews | | Global Trade Identification Number | 00700042010332, 00700042029426 | | Included Components | Flowmaster 42541 40 Series Muffler - 2.50 Offset IN / 2.50 Center OUT - Aggressive Sound | | Item Dimensions | 19.7 x 10.2 x 4.5 inches | | Item Type Name | Flowmaster 42541 40 Series Muffler - 2.50 Offset IN / 2.50 Center OUT - Aggressive Sound | | Item Weight | 8.4 Pounds | | Item dimensions L x W x H | 19.7 x 10.2 x 4.5 inches | | Manufacturer | Flowmaster | | Manufacturer Part Number | 42541 | | Manufacturer Warranty Description | Check with the manufacturer | | Material | Alloy Steel | | Material Type | Alloy Steel | | Model Number | 42541 | | OEM Equivalent Part Number | 42541 | | Part Interchange Info | 42541 | | Shape | Oval | | UPC | 700042010332 700042029426 | | Unit Count | 1.0 Count | | Vehicle Service Type | Car | ## Product Details - **Brand:** Flowmaster - **Item Weight:** 8.4 Pounds - **Item dimensions L x W x H:** 19.7 x 10.2 x 4.5 inches - **Material:** Alloy Steel - **Vehicle Service Type:** Car ## Images ![42541 40 Series Muffler - 2.50 Offset In and 2.50 Center Out - Aggressive Sound - Image 1](https://m.media-amazon.com/images/I/71u5C80+TOL.jpg) ## Available Options This product comes in different **Color** options. ## Questions & Answers **Q: Will these fit a 2004 ford crown victoria interceptor ?** A: universal mufflers do not directly fit any application . They require measuring , cutting adding pipe etc . Direct fitments are under cat back systems . **Q: Will this fit my 1997 k1500?** A: Yes, the Flowmaster 42541 40 Series Muffler - 2.50 Offset IN / 2.50 Center OUT - Aggressive Sound, Black will fit your 1997 K1500. It is a universal muffler, so it can be fitted to any vehicle with a 2.50 inch exhaust system. However, it is important to note that the Flowmaster 40 Series mufflers are known for being loud. If you are looking for a more subdued sound, you may want to consider a different muffler series, such as the 50 or 60 Series. **Q: spec say it wont fit but it has the same demensions and intake and oulet pipe size, will it fit on my 1997 dodge ram 1500** A: If the pipe inlet is 2.5 inches and the pipe outlet is 2.5 inches, it will work. **Q: Is this muffler lound on the inside** A: It dose resonate inside the car quite a bit ## Customer Reviews ### ⭐⭐⭐⭐⭐ 👌 *by E***. on October 10, 2025* Put this on my wife's jeep commander with the 5.7 hemi. It sounds great ### ⭐⭐⭐⭐⭐ Sounds great, dented both mufflers in in shipping *by N***A on July 9, 2022* Flowmasters are good, both mufflers were dented pre Amazon packaging I believe, they are going on a 50k show car and need them for the car show this weekend, no time to return or exchange. Pretty disappointed in packaging and shipping. Flowmasters are good sounding parts, nothing to complain on the brand itself. 1970 mustang, with a built 351C, gives it the classic muscle car sound, will be hitting the dyno next week to see if I loose or gain any HP ### ⭐⭐⭐⭐⭐ 2010 Ford F-150 4.6L V8 *by B***T on January 25, 2025* Perfect amount of sound for me a 35 year old. Great idle, great sound when giving it just a little gas and on the highway. Left my resonator on and so I haven’t noticed any drone on the highway with the radio on just on low volume. Would buy again. ## Frequently Bought Together - Flowmaster 42541 40 Series Chambered Muffler - EVIL ENERGY 2.5 Inch Exhaust Clamp,2 1/2" Butt Joint Band Clamp Sleeve Coupler Stainless Steel for Pipes,Mufflers,Catalytic Converters 2PC - Walker 36272 Exhaust System Hanger --- ## 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.co.th/products/1324759-42541-40-series-muffler-2-50-offset-in-and-2](https://www.desertcart.co.th/products/1324759-42541-40-series-muffler-2-50-offset-in-and-2) --- *Product available on Desertcart Thailand* *Store origin: TH* *Last updated: 2026-06-09*