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Catless Downpipe Exhaust for 2012-2018 Jeep Wrangler JK 3.6L V6
1 Item · Downpipe Exhaust + Y pipe · SKU: FLKT08053-KT08050
$464.00
Product Specifications
The factory exhaust on your 2012-2018 Jeep Wrangler JK 3.6L Pentastar V6 restricts flow right where it matters most — between the Y-pipe merge and the mid-section. This Flashark Catless downpipe replaces that restrictive catalytic converter section with a free-flowing 2" diameter, 3-piece stainless steel system, reducing backpressure for 8-12 whp gains and a deeper, more aggressive exhaust note.
The 3-piece modular design makes installation straightforward even on a tight JK undercarriage — no need to fight one long, rigid pipe into place. Four O2 sensor bungs (2 primary + 2 secondary) accommodate both upstream and downstream sensor locations, so you can retain proper monitoring or install anti-foulers to prevent CEL triggers. Bolt-on to OE mounting points with no cutting or welding required.
Important: This is a Catless (catalytic converter delete) product designed for off-road, track, and competition use only. Not legal for street use in states with emissions testing. A tune is recommended to optimize fuel trims and prevent check-engine lights.
Key Features
Catless Design — Maximum Flow: Removes the restrictive factory catalytic converter for the lowest backpressure path, unlocking 8-12 whp and improved throttle response on your Pentastar V6
2" Diameter Matches OE Routing: Maintains the factory 2" pipe diameter for proper fitment and velocity on the JK 3.6L — oversized pipes can sacrifice low-end torque where Jeeps need it most
3-Piece Modular Construction: Breaks the downpipe into three separate sections for easier maneuvering under the JK's tight undercarriage — install each piece individually without fighting one long rigid pipe
4x O2 Sensor Bungs (2 Primary + 2 Secondary): Pre-drilled bung locations for both upstream and downstream oxygen sensors, allowing proper sensor relocation or anti-fouler installation to manage CEL triggers
Stainless Steel, Mirror-Polished: TIG-welded stainless steel construction with mirror-polished finish for corrosion resistance and a clean undercarriage appearance
Bolt-On to OE Mounting Points: Direct replacement design — no cutting, welding, or custom fabrication required. Uses factory flange connections and hanger locations
Compatible with All JK Trims: Fits 2-door Wrangler JK and 4-door Wrangler JK Unlimited across all trim levels (Sport, Sport S, Sahara, Rubicon, 75th Anniversary Edition) with the 3.6L Pentastar V6
Y-Pipe Upgrade Available: Pair with the Flashark JK 3.6L Y-Pipe ($229) for a complete front-end exhaust upgrade — Downpipe + Y-Pipe combo replaces both the merge pipe and cat section for maximum flow gain
Specifications:
SKU: FLKT08053
Brand: Flashark
Product Type: Downpipe Exhaust (Catless / Catalytic Converter Delete)
Material: Stainless Steel
Finish: Mirror-Polished
Pipe Diameter: 2" (matches OE JK 3.6L exhaust routing)
Design: 3-Piece modular downpipe
O2 Sensor Bungs: 4 total — 2 primary (upstream) + 2 secondary (downstream)
Construction: TIG-welded, mandrel-bent
Installation: Bolt-on to OE mounting points, no cutting or welding
Recommended Tune: Required for Catless installation to prevent CEL and optimize fuel trims
Fitment: 2012-2018 Jeep Wrangler JK & JK Unlimited (all trims) with 3.6L Pentastar V6
Package Includes
3-piece Catless downpipe (1 × front section, 1 × relocation loop pipe, 1 × rear section)
1 × Flange gaskets
1 × Stainless steel clamps
1 × Installation guide
Upgrade Your Sound & Performance!
Pair your 2012-2018 Jeep Wrangler JK 3.6L Downpipe Exhaust with a high-quality muffler to refine its aggressive tone and maximize performance. Choose from our top muffler picks—whether you want a deep growl for daily driving or a loud, race-ready roar. Bundle your downpipe with a muffler!
What does a downpipe do?
The Jeep Wrangler downpipe helps direct exhaust gases away from the engine, improving exhaust flow. By replacing the factory downpipe with a high-flow aftermarket option, you reduce backpressure, allowing your 2012-2018 Jeep Wrangler JK 3.6L to perform better. This upgrade increases horsepower, torque, and turbo efficiency, while also delivering a deeper, more aggressive exhaust sound.
Designed for a perfect fit on all Jeep Wrangler JK models, the FLASHARK downpipe is made of high-quality stainless steel with O2 sensor bungs and 2" connection pipes, ensuring improved performance and reliability.
