Cat-Back System

Muffler contains an internal H-Pipe for increased performance and improved sound. 140638 is a full True Dual, split rear exit, Cat-Back(tm) system with 4" black chrome on T-304 stainless steel tips. Using Borla(r) Stainless Steel Polish p# 21499 is NOT recommended with these black chrome tips. Bright chrome on T-304 stainless steel tips are also available. We suggest cleaning the tips with hot water and a microfiber cloth. Bright chrome on T304 stainless steel tips are also available. Borla(r) Cat-Back(tm) and Axle-Back exhaust systems feature patented straight-through and multi-core technology designed to unleash hidden horsepower. Increased exhaust velocity adds power, driving excitement, fuel economy, and the distinctive Borla(r) Sound of Power respected by motoring enthusiasts everywhere. Each system is built from premium T-304 stainless steel, superior to T-400 series knockoffs (such as 409), to give you the absolute best in performance and durability. Ultra-smooth mandrel bends ensure maximum flow & power, and precision computer numerical control (CNC) manufacturing ensures an accurate fit. Best of all, Borla(r) stands behind every system with a Million-Mile Warranty. Just what you'd expect from the world's most experienced (and most winning) exhaust brand.

Additional Information

Touring Cat-Back Exh Sys. 2014-2021 Toyota Tundra 4.6L/ 5.7L V8 Auto. Trans. 2WD/4WD Reg. Cab With Long Bed (8' 2") 145.7" WB/Ext. (Double) Cab With Standard Bed (6' 7") 145.7" WB/Crew (CrewMax) Cab With Short Bed (5' 7") 145.7" WB.

Application Summary

2014-2021 Toyota Tundra 4.6L/ 5.7L V8 Automatic Transmission 2 & 4 Wheel Drive Regular Cab With Long Bed (8' 2") 145.7" Wheelbase/ Extended (Double) Cab With Standard Bed (6' 7") 145.7" Wheelbase/ Crew (CrewMax) Cab with Short Bed (5' 7") 145.7" Wheelbase.

Part Type

Exhaust System Kit

Product Overview

Muffler contains an internal H-Pipe for increased performance and improved sound. 140638 is a full True Dual, split rear exit, Cat-Back system with 4" black chrome on T-304 stainless steel tips. Using BORLA Stainless Steel Polish p# 21461 is NOT recommended with these black chrome tips. Bright chrome on T-304 stainless steel tips are also available. We suggest cleaning the tips with hot water and a microfiber cloth. Bright chrome on T304 stainless steel tips are also available. BORLA Cat-Back and Axle-Back exhaust systems feature patented straight-through and multi-core technology designed to unleash hidden horsepower. Increased exhaust velocity adds power, driving excitement, fuel economy, and the distinctive BORLA Sound of Power respected by motoring enthusiasts everywhere. Each system is built from premium T-304 stainless steel, superior to T-400 series knockoffs (such as 409), to give you the absolute best in performance and durability. Ultra-smooth mandrel bends ensure maximum flow & power, and precision computer numerical control (CNC) manufacturing ensures an accurate fit. Best of all, BORLA stands behind every system with a Million-Mile Warranty. Just what you'd expect from the world's most experienced (and most winning) exhaust brand.

• Muffler contains an internal X-Pipe
• True Dual system

Important Notice relating to US Domestic Market Trucks & Pickups

Many US-market trucks and pickups are available in multiple cab and bed-length configurations (e.g., Single Cab, Extended Cab, Double/Crew Cab, CrewMax, 5.5ft/6.5ft/8ft beds, etc.). Exhaust system fitment can vary between these chassis versions.

Where available, we list all compatible vehicles, cab types, and bed lengths in the product description. However, depending on your exact configuration, some systems may require optional extension/mid-pipes or minor modification for correct fitment.

Because of these variations, please carefully check your cab configuration and bed length before purchasing. If you are unsure, or if your vehicle has been modified, please reach out to a StreetFX agent.

Images are supplied by the manufacturer and may be generic. While all efforts are made to provide accurate pictures, there may be differences in the actual product, such as colour, quantity, version, or included components. Please carefully review the description and specifications for details on inclusions or any variations. Some items may be sold individually or in sets, and images may occasionally depict additional products or quantities not included in your purchase. For assistance or clarification, please contact customer support.

Product Details

Reference Information

Exhaust System, Touring, Cat-Back, Dual In/Dual Out, Stainless Steel, Natural, Split Rear Exit, Toyota, 4.6L, 5.7L, Kit

Borla realizes that every driver has their own preference for the volume and character of their exhaust sound. So, if you're not happy with your factory exhaust's sound and performance, upgrade to Borla Touring exhaust systems. Made from the finest austenitic stainless steel for durability, these Touring (and rear axle-backs) deliver more of everything! They offer increased exhaust velocity for added power and driving excitement, along with that distinctive Borla Sound of Power that's respected by motoring enthusiasts everywhere. More than a hundred configurations are available—find the model designed for your vehicle.