Kooks Long Tube Headers & Mid Pipes
18-25 Dodge Durango 6.4L SRT & 6.2L Hellcat
3410H421 / 3410H621 / 3410H431 / 3410H631 / 3410H641
Kooks Long Tube Headers & Mid Pipes are engineered for high-performance 6.4L SRT and 6.2L Hellcat vehicles to maximize horsepower, torque, and exhaust flow. Crafted from 304 stainless steel, the headers feature 1-7/8" or 2" primaries, TIG-welded, mandrel-bent construction, blended flanges, venturi merge spikes, and welded O2 bungs. These long tube headers provide improved scavenging, reduced collector turbulence, and a powerful, aggressive exhaust tone.
Paired with Kooks 3" catted mid-pipes—available in standard, GREEN, or HIGH OUTPUT GREEN options—this system delivers optimal exhaust performance. All headers include O2 extension harnesses and complete installation hardware. Designed to bolt directly to the factory exhaust via Kooks connection pipes. Enhances throttle response, performance, and engine sound. Not compatible with California-licensed vehicles; not CARB compliant.
- 304 stainless steel construction, TIG-welded and mandrel-bent
- 1-7/8" or 2" primaries with 3" collectors
- Integrated venturi merge spike for optimized exhaust scavenging
- Pre-welded O2 bungs; includes O2 extension harnesses
- TIG-welded, continuous tube primaries for durability
- Connection pipes required to interface with stock exhaust
- Mid-pipe options: 3" standard catted, GREEN catted, or HIGH OUTPUT GREEN
- EPA-certified GREENCATS for 49-state legality (GREEN option)
- Increases horsepower, torque, and throttle response
- Produces aggressive, high-performance exhaust tone
- Designed for 6.2L Hellcat & 6.4L SRT vehicles
- Not legal for sale, installation, or use in California; not CARB compliant
