Unless you're idling for hours on end sitting in the car, carbon monoxide isn't going to be an issue. That whole airflow thing when you're driving tends to take care of it.

Plus a diesel engine produces almost no CO compared to a gasoline one.

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05CRD: GDE Hot ECU & TCM tunes, Provent, Cat filter, Facet lift pump, TransGo kit, Florida TC, Samcos, stainless brake lines, HDS thermostat, Renegade light bar,
RL super sliders, Bilstein adjustables, Al's Gen 4.5 Arms, 235/85-16 Duratracs, DTT rear, Elocker front, EVIC+TPMS, Turbo timer, McNally pillar gauges, Weeks Stage II kit.

Stuck to 2.5" delete pipe for cat and free flow muffler.

Awesome turbo performance now, not loud even without cat, puurrrrfect......

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06 CRD LTD ( Euro )

I thought about that. I saw how eurekaboy did his but I would lose clearance and the rocks out here are not friendly to stuff that hangs down too far. I will probably just eliminate the muffler and add a straight pipe between the cat and the stock pipe for now. I may try a turn down right after the cat just for kicks and giggles to see how it works and sounds.

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'06 Stone White, CRD Limited
CRD Frankenlift II, Rock Lizard Rear Bumper, Mann Provent, GDE FT-ECO Tune, "Euro Torque Converter, Transgo 545RFE-H2 Shift Kit, 245/75 MT/R's on Moabs, Full Mopar Skids, Front Tow Hooks, CAT 2 Fuel filter and bleeder valve mod, Fumoto valve, Wahlbro Lift Pump, Custom 2 1/2" Exhaust

So, 2mopar_diesels, you have had the striker installed for a month.
How is the mileage?

<edit> DOH! I didnt see you started a new thread </edit>

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06 Silver CRD
SEGR, Provent,
3" exhaust w/o muffler, Cummins fuel pump

NOISE! The low frequency drone will drive you insane from a subconscious level. I had under-car exits on a previous car... The drone was maddening.