SKU: 401664 | UPC: 808422016643
Borla Specialty Muffler 2.75in Center In/Out 6.75in Dia. 24in Body 29in OAL S-Type Un-Notched - Universal Truck Fit
Developed for truck applications and custom setups needing a long-body muffler, the Borla 401664 delivers aggressive S-Type sound with free-flow exhaust performance. This 29-inch overall length muffler features 2.75-inch center inlet/outlet necks, un-notched for weld-in installs on trucks and SUVs. T-304 stainless steel construction ensures lasting durability in demanding conditions.
Key Features
- T-304 Austenitic Stainless Steel: Resists rust completely for long-term reliability in harsh environments.
- 100% Welded Construction: Delivers maximum strength without weak points.
- Free Flow Design: Boosts horsepower and torque by reducing backpressure.
- CFF Acoustic Material: High-temperature fiber controls sound while maintaining flow.
- Reversible Design: Fits either direction for easy custom routing.
Product Notes
- Un-notched necks for weld-in installation; notched alternate is 400130.
- Requires wide band clamps 18327 (sold separately).
- Natural mill finish; brush or polish surface before install.
Installation Notes
- Professional installation recommended.
- Weld-in necks require precise cutting and welding skills.
- Wide band clamps 18327 ensure secure, leak-free connections.
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| Universal | Various Trucks/SUVs | Custom Exhaust | All |
| 2009-2023 | Dodge | Ram 1500 | 5.7L HEMI |
| 2004-2023 | Ford | F-150 | 4.6L/5.4L/5.0L |
| 1999-2023 | Chevrolet/GMC | Silverado/Sierra 1500 | 5.3L/6.2L |
Why Choose Borla?
- USA-made with Million-Mile warranty for total confidence.
- Proven track record in racing and street performance.
- Engineered for precise fit and real-world power gains.
Frequently Asked Questions
-
Q: Will this muffler fit my specific truck?
A: Universal design suits most trucks/SUVs with 2.75" piping; confirm measurements for custom exhaust systems on Ram 1500, F-150, Silverado. -
Q: What material and finish does it have?
A: T-304 stainless steel in natural mill finish; polish or brush for custom look, resists corrosion fully. -
Q: What warranty and sound level?
A: Million-Mile warranty covers it; S-Type provides aggressive tone with controlled interior noise via CFF packing.
Shipping & Handling
- Method: UPS Ground
- Availability: In stock - ships same or next business day
- Packaging: Protective cardboard box, 30" L x 8" W x 8" H
- Weight: 19 lbs
Borla
Shop Borla exhaust systems at Black Ops Auto Works for cat-back exhausts, axle-back exhausts, mufflers, resonators, exhaust tips, X-pipes, H-pipes, mid-pipes, tailpipe kits, connection pipes, exhaust cleaner, and performance exhaust accessories. Borla is trusted by enthusiasts who want aggressive sound, improved exhaust flow, premium materials, long-term durability, and vehicle-specific fitment for cars, trucks, SUVs, Jeeps, and performance builds. Use this Borla collection to choose the right exhaust upgrade by vehicle platform, sound level, tip finish, and exhaust configuration. Borla ATAK systems are built for maximum sound, Borla S-Type systems deliver a strong performance tone with daily drivability, and Borla Touring systems are designed for a smoother, more refined exhaust note. Shop Borla Exhaust Parts by Category Black Ops Auto Works carries Borla exhaust products across key performance categories including cat-back exhaust systems, axle-back exhaust systems, S-Type exhaust...
View Borla Products
Exhaust Systems
Shop performance exhaust systems at Black Ops Auto Works for cat-back exhausts, axle-back exhausts, headers, downpipes, mid-pipes, X-pipes, H-pipes, mufflers, resonators, exhaust tips, catalytic converters, exhaust gaskets, exhaust hardware, tail pipes, turbo-back exhausts, DPF-back exhausts, and performance exhaust accessories. This collection is built for enthusiasts who want better sound, improved exhaust flow, sharper throttle response, premium styling, and vehicle-specific fitment. Use this Exhaust Systems collection to find the right upgrade by vehicle platform, sound goal, exhaust layout, and product type. Cat-back exhaust systems provide a more complete performance upgrade, axle-back exhausts improve rear-section tone and appearance, headers and downpipes support better exhaust flow, and exhaust tips, mufflers, resonators, X-pipes, and H-pipes help fine-tune sound and performance. Shop Exhaust Systems by Category Black Ops Auto Works carries exhaust parts across key performa...
View Exhaust Systems Products
Mufflers
Welcome to our Mufflers collection, where performance meets style. Our curated selection offers a variety of mufflers to enhance your vehicle’s sound and efficiency. Whether you’re looking for a subtle upgrade or a loud statement piece, we have the perfect options for you. Why Choose Our Mufflers? High-Quality Materials: Crafted from durable materials to ensure longevity and reliability. Performance Enhancement: Designed to improve your vehicle’s exhaust flow and overall performance. Stylish Designs: Available in various styles to suit your personal taste and vehicle aesthetics. Easy Installation: Many of our mufflers come with easy-to-follow installation instructions for a hassle-free upgrade. Featured Products Check out some of our top-selling mufflers: Performance Muffler X1: Boosts horsepower while providing a deep, aggressive sound. Eco-Friendly Muffler Series: Designed to reduce emissions without compromising on performance. Customizable Muffler Kit: Personalize you...
View Mufflers Products
Mufflers & Resonators
Welcome to our exclusive Mufflers & Resonators collection! We have meticulously curated options to cater to all automotive enthusiasts. Whether you seek to enhance your vehicle's sound, improve performance, or simply replace worn-out parts, you'll find the perfect solutions here. Why Choose Our Mufflers & Resonators? High Quality: Each product is made from durable materials ensuring longevity. Enhanced Performance: Our selection is designed to improve exhaust flow for better horsepower. Sound Customization: Choose from a variety of sounds to match your style—from aggressive to subtle. Easy Installation: Most products come with straightforward installation instructions. Shop Our Top Products Explore some of our best-selling Mufflers & Resonators: Performance Muffler Series High-Flow Resonators Universal Muffler Kits Custom Exhaust Systems Customer Satisfaction Guaranteed We pride ourselves on providing excellent customer service. Our team is here to help you ch...
View Mufflers & Resonators Products


