--- product_id: 242820301 title: "Flowmaster 425404 40 Series Exhaust Muffler, 1 Pack" brand: "flowmaster" price: "¥65678" currency: JPY in_stock: true reviews_count: 5 category: "Flowmaster" url: https://www.desertcart.jp/products/242820301-flowmaster-425404-40-series-exhaust-muffler-1-pack store_origin: JP region: Japan --- # Interior resonance - immersive sound experience Aggressive exterior exhaust tone - unmistakable presence 16 gauge aluminized steel - rugged durability Flowmaster 425404 40 Series Exhaust Muffler, 1 Pack **Brand:** flowmaster **Price:** ¥65678 **Availability:** ✅ In Stock ## Summary > 🔥 Own the road with the legendary Flowmaster roar! ## Quick Answers - **What is this?** Flowmaster 425404 40 Series Exhaust Muffler, 1 Pack by flowmaster - **How much does it cost?** ¥65678 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/242820301-flowmaster-425404-40-series-exhaust-muffler-1-pack) ## 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 Last:** Fully welded 16 gauge aluminized steel ensures unmatched durability for street, strip, and off-road adventures. - • **Universal Fit:** Designed to fit a wide range of vehicles, making upgrades effortless and hassle-free. - • **Immersive Audio Vibes:** Noticeable interior resonance creates a rich, full-bodied sound that enthusiasts crave. - • **Versatile Performance:** Perfectly engineered for street, strip, and off-road applications—your all-terrain sound solution. - • **Iconic Flowmaster Sound:** Delivers that signature aggressive exterior rumble that commands attention wherever you go. ## Overview The Flowmaster 425404 40 Series Exhaust Muffler is a fully welded, 16 gauge aluminized steel muffler designed for universal fit. It delivers an aggressive exterior exhaust tone with noticeable interior resonance, making it ideal for street, strip, and off-road use. Known for its durability and iconic sound, it’s the go-to choice for drivers seeking that classic Flowmaster rumble. ## Description The Original 40 series muffler delivers an aggressive exterior and interior tone. If you're looking for that original Flowmaster sound, this is the muffler for you. Constructed of 16 gauge aluminized steel and fully MIG welded for maximum durability. Review: Best bang “rumble” for the buck Review: This muffler isbadass. It sounds awesome! ## Features - Durable fully welded 16 gauge aluminized steel - Aggressive sound exterior exhaust tone - Noticeable interior resonance - Excellent Street/Strip and Off Road application - Fit type: Universal Fit ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B01IDDG3V0 | | Automotive Fit Type | Universal Fit | | Best Sellers Rank | #19,539 in Automotive ( See Top 100 in Automotive ) #34 in Automotive Replacement Exhaust Mufflers | | Brand | Flowmaster | | Configuration | Dual/Dual | | Customer Reviews | 4.7 4.7 out of 5 stars (119) | | Date First Available | July 19, 2016 | | Exterior | Painted | | Global Trade Identification Number | 00700042026029 | | Inlet Connection Size | 2.5 Inches | | Is Discontinued By Manufacturer | No | | Item Weight | 10.25 pounds | | Item dimensions L x W x H | 20.5 x 10 x 4.5 inches | | Item model number | 425404 | | Manufacturer | Flowmaster | | Manufacturer Part Number | 425404 | | Model | 425404 | | OEM Part Number | 425404 | | Product Dimensions | 20.5 x 10 x 4.5 inches | | Shape | Oval | | UPC | 700042026029 | | Vehicle Service Type | Car | ## Product Details - **Brand:** Flowmaster - **Item Weight:** 10.25 Pounds - **Item dimensions L x W x H:** 20.5 x 10 x 4.5 inches - **Material:** Alloy Steel - **Vehicle Service Type:** Car ## Images ![Flowmaster 425404 40 Series Exhaust Muffler, 1 Pack - Image 1](https://m.media-amazon.com/images/I/71PeQy5X1iL.jpg) ![Flowmaster 425404 40 Series Exhaust Muffler, 1 Pack - Image 2](https://m.media-amazon.com/images/I/71W8SizHYwL.jpg) ![Flowmaster 425404 40 Series Exhaust Muffler, 1 Pack - Image 3](https://m.media-amazon.com/images/I/81in03ZdSxL.jpg) ![Flowmaster 425404 40 Series Exhaust Muffler, 1 Pack - Image 4](https://m.media-amazon.com/images/I/81jBSKJtzRL.jpg) ![Flowmaster 425404 40 Series Exhaust Muffler, 1 Pack - Image 5](https://m.media-amazon.com/images/I/81gHF3UO0zL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Review *by A***M on 29 October 2020* Best bang “rumble” for the buck ### ⭐⭐⭐⭐⭐ Review *by C***N on 26 November 2025* This muffler isbadass. It sounds awesome! ### ⭐⭐⭐⭐⭐ Review *by J***S on 17 October 2025* Great muffler ## Frequently Bought Together - Flowmaster 425404 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 1PCS - EVIL ENERGY 2.5'' Exhaust Clamp,Lap Joint Band Clamp Stainless Steel for Pipes,Mufflers,Catalytic Converters (1, 2.5 inch) --- ## 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.jp/products/242820301-flowmaster-425404-40-series-exhaust-muffler-1-pack](https://www.desertcart.jp/products/242820301-flowmaster-425404-40-series-exhaust-muffler-1-pack) --- *Product available on Desertcart Japan* *Store origin: JP* *Last updated: 2026-05-13*