Jeep Grand Cherokee SRT & SRT-8 6.4L Hemi V8, 2012-2020, Cherokee 5.7L
MPI AutomotiveRRP$1350.91Jeep Grand Cherokee SRT & SRT-8 6.4L Hemi V8, 2012-2020, Cherokee 5.7L V8 2011-2015 3" Rear Mufflers for selected vehicle applications.
View partSSMBM798PHD
Jeep Grand Cherokee SRT & SRT-8, 6.4L Hemi V8, 2012-2020 3" Dual Center Hotdogs
Jeep Grand Cherokee SRT & SRT-8, 6.4L Hemi V8, 2012-2020 3" Dual Center Hotdogs for selected vehicle applications.
BrandMantaMPI Automotive
Category: Mufflers and resonators
RRP $1092.30 AUD
In stock at supplierAfterpay, Zip Pay & Zip Money available
Part specs
- SKU
- SSMBM798PHD
- Supplier
- MPI Automotive
- Category
- Mufflers and resonators
- Stock status
- In stock at supplier
Built for the bigger Hemi, the MPI Automotive SSMBM798PHD is a pair of 3in dual centre hotdog resonators listed to fit the Jeep Grand Cherokee SRT and SRT-8 6.4L Hemi V8 (2012–2020). The hotdog resonators are the focus: drone control in the centre of the system without choking flow.
Where do these hotdogs sit and what's their job?
These are centre-section resonators — slim straight-through cans with a perforated core in packing, fitted as a dual pair through the middle of the car. Their job isn't to drop overall volume the way a chambered rear muffler does; it's to cancel the resonant frequencies that cause cabin boom at cruise while keeping exhaust flow largely unobstructed. On the 6.4L SRT Hemi that keeps the deep V8 character intact and pulls the worst of the highway drone out of the cabin. It's the centre-resonator route, paired with the rest of the system you run.
Why the 3in dual layout for the 6.4L SRT?
The SSMBM798PHD runs 3in dual pipes with a hotdog on each side, matching the twin-bank layout of the 6.4L Hemi and a bore sized for that engine's output. It's specific to the SRT and SRT-8 6.4L Grand Cherokee across 2012 to 2020, so it's the centre section aimed at that hot model rather than the lesser engines. Confirm your exact year and variant with the workshop before ordering, as the WK2 SRT saw running changes over its life.
Is it road legal?
These are centre resonators only — they don't include or delete the catalytic converter, so the cat-delete off-road rules don't apply to this part. The final note depends on the whole system; confirm the in-service result and any state requirements with the workshop before fitting.
What does fitting involve at our Illawarra workshop?
Oak Flats Muffler Men fits SRT centre resonators in-house across the Illawarra, checking the dual hotdogs clear the floor and tunnel and mate to your front and rear pipework. The SSMBM798PHD carries a published RRP of $1,092.30; send your build and we'll confirm fitment and book the bay.
Stocked and fitted by Oak Flats Muffler Men, the Illawarra exhaust and 4x4 specialist in Oak Flats, NSW.
Common questions
- What do these hotdogs do on a 6.4L SRT?
- They sit in the centre and cancel cruise drone while keeping flow up, so the Hemi keeps its character without booming on the highway. They aren't a rear muffler and don't focus on lowering overall volume.
- Will it fit my SRT-8?
- It's listed to fit the Jeep Grand Cherokee SRT and SRT-8 6.4L Hemi V8 from 2012 to 2020. Confirm your exact year and variant with the workshop before ordering.
- Is this the whole exhaust?
- No — it's the dual 3in centre hotdog resonators only. They pair with your existing front and rear pipework.
Fitment support across the Illawarra
Fitment checks near you across 18 Illawarra suburbs, from Oak Flats and Shellharbour to Wollongong and Kiama.Show nearby fitment areasCollapse section
Oak Flats Muffler Men can check this part against supplier specs, part number, image, RRP and vehicle details for customers around Oak Flats, Shellharbour, Wollongong, Dapto, Albion Park, Kiama and the northern suburbs.
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Send the vehicle make, model, year, engine, current issue, desired sound or performance goal, and clear photos of the existing exhaust where available.