--- product_id: 53257432 title: "Flowmaster 40 Series Original Chambered Muffler – 2.50” Offset In / 2.50” Center Out – Aggressive Sound – 16-Gauge Aluminized Steel – For Muscle Cars, Street Rods, Trucks, SUVs & Strip Builds (42541)" brand: "flowmaster" price: "$832.69" currency: USD in_stock: true reviews_count: 5 category: "Flowmaster" url: https://www.desertcart.ec/products/53257432-flowmaster-40-series-original-chambered-muffler-2-50-offset-in store_origin: EC region: Ecuador --- # Two-chambered aggressive sound design 16-gauge aluminized steel durability Universal fit for custom exhausts Flowmaster 40 Series Original Chambered Muffler – 2.50” Offset In / 2.50” Center Out – Aggressive Sound – 16-Gauge Aluminized Steel – For Muscle Cars, Street Rods, Trucks, SUVs & Strip Builds (42541) **Brand:** flowmaster **Price:** $832.69 **Availability:** ✅ In Stock ## Summary > 🔥 Turn heads and drop jaws with the original aggressive roar! ## Quick Answers - **What is this?** Flowmaster 40 Series Original Chambered Muffler – 2.50” Offset In / 2.50” Center Out – Aggressive Sound – 16-Gauge Aluminized Steel – For Muscle Cars, Street Rods, Trucks, SUVs & Strip Builds (42541) by flowmaster - **How much does it cost?** $832.69 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.ec](https://www.desertcart.ec/products/53257432-flowmaster-40-series-original-chambered-muffler-2-50-offset-in) ## 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 with full MIG welds ensures unmatched heat and vibration resistance. - • **Custom Fit Flexibility:** Multiple inlet/outlet configurations for seamless integration with your muscle car or truck build. - • **Street Cred Guaranteed:** Join thousands of enthusiasts who trust Flowmaster for bold performance and unmistakable presence. - • **Iconic Aggressive Sound:** Unleash the legendary Flowmaster bark that commands attention on every street and strip. - • **Precision Two-Chamber Design:** Engineered to optimize exhaust flow, boosting horsepower, torque, and throttle response. ## Overview The Flowmaster 40 Series Original Chambered Muffler delivers a signature aggressive exhaust tone through its classic two-chamber design. Crafted from durable 16-gauge aluminized steel with full MIG welding, it enhances horsepower and torque by improving exhaust flow. Designed for universal fitment with multiple inlet/outlet options, it’s the go-to choice for muscle cars, trucks, and custom street builds seeking bold sound and proven performance. ## Description he Flowmaster Original 40 Series Muffler is the icon that launched a movement. Designed for enthusiasts who demand bold sound and proven performance, the 40 Series delivers that signature aggressive bark Flowmaster is known for around the world. Ideal for classic muscle cars, modern trucks, off-road rigs, and street builds, this muffler makes a statement that can’t be ignored. Built with Flowmaster’s classic two-chamber internal design, it improves exhaust flow to boost torque and horsepower while delivering that throaty, attention-grabbing tone under acceleration. Constructed from durable 16-gauge aluminized steel and fully MIG-welded, the 40 Series is built to handle high heat, vibration, and tough road conditions without internal packing to break down. Offered in a variety of inlet/outlet sizes and configurations (center/offset, dual), the Original 40 Series supports a wide range of custom or modified exhaust setups. Features: Classic two chambered design for aggressive bark and proven performance Throaty, high-impact sound for street and performance builds 16-gauge aluminized steel construction for lasting durability Fully MIG-welded to withstand high heat and vibration Universal fit options for custom and modified exhaust systems Review: Great quality - All as explained and expected. Amazing mufflers. Review: 40 series flowmaster - Sounds good! 40 series Flowmaster ## 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 | 427,577 in Automotive ( See Top 100 in Automotive ) 136 in Car Silencers | | Brand | Flowmaster | | Brand Name | Flowmaster | | Compatible with Vehicle Type | Car | | Configuration | Centre/Offset | | Customer Reviews | 4.8 out of 5 stars 408 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 | 50 x 25.9 x 11.4 centimetres | | Item Shape | Oval | | Item Type Name | Flowmaster 42541 40 Series Muffler - 2.50 Offset IN / 2.50 Center OUT - Aggressive Sound | | Item Weight | 4.31 kg | | Item dimensions L x W x H | 50 x 25.9 x 11.4 centimetres | | Item weight | 4.31 kg | | Manufacturer | Flowmaster | | Manufacturer Part Number | 42541 | | Manufacturer Warranty Description | Aluminized Steel: 1 Year Limited Warranty; 409 Stainless Steel: Limited Lifetime Warranty | | Material | Plastic | | Material Type | Plastic | | Model Number | 42541 | | Number of Items | 1 | | OEM Equivalent Part Number | 42541 | | UPC | 700042010332 700042029426 | | Unit Count | 1.0 count | | Vehicle service type | Car | ## Product Details - **Brand:** Flowmaster - **Item dimensions L x W x H:** 50 x 25.9 x 11.4 centimetres - **Item weight:** 8.4 Pounds - **Material:** Plastic - **Vehicle service type:** Car ## Images ![Flowmaster 40 Series Original Chambered Muffler – 2.50” Offset In / 2.50” Center Out – Aggressive Sound – 16-Gauge Aluminized Steel – For Muscle Cars, Street Rods, Trucks, SUVs & Strip Builds (42541) - Image 1](https://m.media-amazon.com/images/I/71u5C80+TOL.jpg) ![Flowmaster 40 Series Original Chambered Muffler – 2.50” Offset In / 2.50” Center Out – Aggressive Sound – 16-Gauge Aluminized Steel – For Muscle Cars, Street Rods, Trucks, SUVs & Strip Builds (42541) - Image 2](https://m.media-amazon.com/images/I/71zp1wSCWbL.jpg) ![Flowmaster 40 Series Original Chambered Muffler – 2.50” Offset In / 2.50” Center Out – Aggressive Sound – 16-Gauge Aluminized Steel – For Muscle Cars, Street Rods, Trucks, SUVs & Strip Builds (42541) - Image 3](https://m.media-amazon.com/images/I/81bmDgrOJPL.jpg) ![Flowmaster 40 Series Original Chambered Muffler – 2.50” Offset In / 2.50” Center Out – Aggressive Sound – 16-Gauge Aluminized Steel – For Muscle Cars, Street Rods, Trucks, SUVs & Strip Builds (42541) - Image 4](https://m.media-amazon.com/images/I/81jBSKJtzRL.jpg) ![Flowmaster 40 Series Original Chambered Muffler – 2.50” Offset In / 2.50” Center Out – Aggressive Sound – 16-Gauge Aluminized Steel – For Muscle Cars, Street Rods, Trucks, SUVs & Strip Builds (42541) - Image 5](https://m.media-amazon.com/images/I/81gHF3UO0zL.jpg) ## 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 ### ⭐⭐⭐⭐⭐ Great quality *by R***. on 24 December 2019* All as explained and expected. Amazing mufflers. ### ⭐⭐⭐⭐⭐ 40 series flowmaster *by A***1 on 27 May 2026* Sounds good! 40 series Flowmaster ### ⭐⭐⭐⭐⭐ Sounds great! *by T***N on 13 November 2025* Sounds great like all the other Flow Master exhausts I’ve had installed! Highly recommend for a GM 5.3 engine. ## 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.ec/products/53257432-flowmaster-40-series-original-chambered-muffler-2-50-offset-in](https://www.desertcart.ec/products/53257432-flowmaster-40-series-original-chambered-muffler-2-50-offset-in) --- *Product available on Desertcart Ecuador* *Store origin: EC* *Last updated: 2026-08-04*