Hi Flow Cats

[Anthony Violi]

I want to swap catalytic converters for hi flow cats. Would I be able to use universal parts? Perhaps cut out the old and weld in the new. There are plenty of affordable cats available. I thought a new set would help the old girl breath a little better. Any ideas?

[zzsteve]

I have had hi flow cats installed in my '95 HSE, but not much improvement subjectively. They were a 'universal' 2 1/4 " converter I think. Got a more impressive gain when the straight through muffler replaced the collapsed OE muffler. Great sound too!
HTH
Steve

[Hammer H]

I had a 3 inch single system fitted, also sounds great.

[TheTree]

While a good idea in theory, by itself it's unlikely to give you much performance boost. Big exhausts sound great though :p

Steve

[Anthony Violi]

I have read that older range rovers can have clogged cats and can be detrimental to health of engine. My vehicle is a 95 gems with 300,000kms has never suffered from overheating issues or blown head gaskets. I have read that older catalytic converters can suffer from carbon build up. I'm unsure whether replacing cats is a good idea or a waste of time?

[Eevo]

clogged or collapsed cats degrade power and increase fuel consumption

[TheTree]

I have read that older range rovers can have clogged cats and can be detrimental to health of engine. My vehicle is a 95 gems with 300,000kms has never suffered from overheating issues or blown head gaskets. I have read that older catalytic converters can suffer from carbon build up. I'm unsure whether replacing cats is a good idea or a waste of time?

Not sure how you tell if they are clogged, but if you bang on them and they rattle they are stuffed for sure !

If they look pretty old then it may be worth replacing them and if it comes to that then why not go for the high flow ones :)

Steve