Dave your mate is spot on saying a hi-flow cat doesn't function as well in one regard but dead wrong in another, what he must be talking about is it's ability to burn off the toxins in the exhaust gas because they have less cells per cm2 in the hi-flow cat.
But as far as letting your engine breath by expelling the exhaust gasses hi-flow cats work much better, so I still can't see why it would effect warranty. Don't worry i'm going to hit my dealership up with the question again to see if I get a different answer form a different person, but the guy I asked is their workshop foreman.
The cat works like pouring water through a piece of gauze, the tighter and smaller the squares in the gauze the slower the water will pour through but the better it will be filtered. That's all a cat is, a big filter that the exhaust gas also heats up causing it to burn particles off in the gas as they pass through it. SO the less cells per cm2 the less resistance and the higher the flow and the less toxins get burned off.
Cheers
James
But as far as letting your engine breath by expelling the exhaust gasses hi-flow cats work much better, so I still can't see why it would effect warranty. Don't worry i'm going to hit my dealership up with the question again to see if I get a different answer form a different person, but the guy I asked is their workshop foreman.
The cat works like pouring water through a piece of gauze, the tighter and smaller the squares in the gauze the slower the water will pour through but the better it will be filtered. That's all a cat is, a big filter that the exhaust gas also heats up causing it to burn particles off in the gas as they pass through it. SO the less cells per cm2 the less resistance and the higher the flow and the less toxins get burned off.
Cheers
James
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