A car with a mileage of 342000 km, a lot and not a lot, certainly the catalytic converter could look better if not for gas. LPG due to its higher combustion temperature will always leave a mark. In this case, it was enough to drive the last 30,000 of the 342,000 km to destroy the catalytic converters. As you can see the cartridges very badly damaged, melted and cracked, typical with lpg. We put in new metal Euro 4 cartridges according to the specifications. The cartridges with a diameter of 125 mm and a length of 100 mm turned out to be ideal. Since there is gas it can not be other than metal cartridges. I have information from the customer that the car has regained power while reducing fuel appetite. Let's hope it will serve another 340 thousand kilometers, because driving a car with such a v8 under the hood is pure pleasure.

Cartridges that were used for regeneration - https://kat-eko.com/pl/uniwersalne/390-2247-wklad-katalizatora-benzyna-awg.html#/37-dlugosc_wkladu-100_mm/50-srednica_wkladu-125_mm/57-norma_euro-euro_4/64-przepustowosc_cpsi-500

Original OE catalyst numbers: 

448AB, 115220234000

1. before regeneration

2. cutting catalysts

3. damaged original ceramic cartridge

4. catalyst casings after cutting

5. fitting of metal catalyst insert 

6. welded catalyst housing