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Give your performance SUV the V8 soundtrack you want
The appeal of a HEMI-powered SUV is how much fun it can add to an ordinary journey. For an exhaust upgrade, these Kooks packages combine stainless long tube headers and OEM connection pipes for the listed Grand Cherokee SRT, Trackhawk and Durango SRT applications. The table gives the confirmed model-year scope for each option, so the header and catalyst choice stays matched to your vehicle.
SKUs: 3410H411, 3410H431, 3410H611, 3410H631, 3410H641
Choose the header and catalyst combination
Both 1-7/8" and 2" primary options use 3" collectors and a 3" OEM rear connection. GREEN catalysts support naturally aspirated and forced-induction applications within their rating. H.O. GREEN uses a larger catalyst body and a 300 CPSI substrate for higher-output builds. Competition Only connections provide catalyst-free pipes for a dedicated competition exhaust.
Retain your compatible rear exhaust
The included connection pipes link the long tube headers to the OEM rear exhaust. The 2" GREEN kit includes gaskets, bolts, clamps and O2 extensions, while the catted kits provide the exhaust parts needed for the compatible OEM connection.
Allow for the fitting work
We recommend professional fitting and calibration for the finished long tube conversion. Installation of the 2" headers involves engine-cradle access, so this is a job to plan with the installer. Sensor routing, heat clearances and a first heat-cycle fastener check are part of finishing the system properly.
Tuning for your header upgrade
We recommend a tune with these headers, matched to your engine and the completed exhaust. Talk to us about tuning for your vehicle and modifications.
Choose your option
| SKU | Header Size | Cat Type | Fitting / contents | Stated use restriction |
|---|---|---|---|---|
| 3410H411 | 1-7/8" | Comp. Only | Grand Cherokee SRT 6.4 2012-2020; Trackhawk 6.2 2018-2020; Durango SRT 6.4 2018-2020. Catalyst-free connections. | Competition, off-road and track use only. Not for use on public roads. Kooks competition-use waiver required. |
| 3410H431 | 1-7/8" | GREEN Cats | Grand Cherokee SRT 6.4 2012-2020; Trackhawk 6.2 2018-2020; Durango SRT 6.4 2018-2020. GREEN catted connections. | |
| 3410H611 | 2" | Comp. Only | Grand Cherokee SRT 6.4 2012-2020; Trackhawk 6.2 2018-2020; Durango SRT 6.4 2018-2020. Catalyst-free connections. | Competition, off-road and track use only. Not for use on public roads. Kooks competition-use waiver required. |
| 3410H631 | 2" | GREEN Cats | Grand Cherokee SRT 6.4 2012-2021; Trackhawk 6.2 2018-2021; Durango SRT 6.4 2018-2022. GREEN catted connections; gaskets, bolts, clamps and O2 extensions included. | |
| 3410H641 | 2" | H.O. GREEN Cats | Grand Cherokee SRT 6.4 2012-2021; Trackhawk 6.2 2018-2021; Durango SRT 6.4 2018-2022. H.O. GREEN catted connections. |
Vehicle fitment
| Years | Vehicle and trim | Engine | Applicable SKU / fitting conditions |
|---|---|---|---|
| 2018-2022 | Dodge Durango SRT | 6.4L V8 | 3410H631, 3410H641. 3410H411, 3410H431 and 3410H611 cover this application only through 2020 |
| 2022 | Dodge Durango SRT 392 | 6.4L V8 | 3410H631, 3410H641 |
| 2012-2015 | Jeep Grand Cherokee SRT8 | 6.4L V8 | 3410H411, 3410H431, 3410H611, 3410H631, 3410H641 |
| 2013-2021 | Jeep Grand Cherokee SRT | 6.4L V8 | 3410H631, 3410H641. 3410H411, 3410H431 and 3410H611 cover this application only through 2020 |
| 2018-2021 | Jeep Grand Cherokee Trackhawk | 6.2L V8 | 3410H631, 3410H641. 3410H411, 3410H431 and 3410H611 cover this application only through 2020 |
Ordering and delivery
Estimated lead time is 4-6 weeks. Delivery may be faster depending on stock levels. Shipping is charged separately.
Technical specifications
| Specification | Details |
|---|---|
| Application | Listed WK2 Grand Cherokee SRT 6.4, Trackhawk 6.2 and Durango SRT 6.4; years vary by SKU below |
| Material | 304 stainless steel |
| Header design | Stainless steel long tube headers |
| Primary diameter choices | 1-7/8" or 2" primary tubes |
| Collector and rear outlet | 3" collectors and 3" OEM rear connection |
| Supplied exhaust parts | Header pair and matching connection pipes |
| 2" GREEN fitting parts | Gaskets, bolts, clamps and O2 extensions |
| Installation detail | 2" header installation involves engine-cradle access |
| Tuning recommendation | Hoonies recommends a tune for the completed header and exhaust installation |
Frequently asked questions
Can I keep the original rear exhaust?
Yes, on the listed compatible application. The packages include a 3" OEM rear connection.
Are the model years identical for every kit?
No. Use the model-year details beside the selected SKU. Some 2" catted options cover later applications than the earlier competition and 1-7/8" kits.
Which kit suits a modified Trackhawk?
Match the primary size to the engine and choose a GREEN-family catalyst with the appropriate capacity for the supercharged build. We can help you compare the listed combinations.
Is this a simple manifold swap?
It is a long tube and connection-pipe conversion. Professional installation is recommended; the 2" header fitting procedure includes engine-cradle access.
