I know there has been a lot of talk about getting an exhaust system beefed up. But my question is what about the Cat Convter. Will keeping the original cat make it perform worse. I am planning on extracters and a 2 1/2 inch system. What do i need to know about the cat. Should i get it replaced?
I have a high flow cat on mine, and IMO they're not worth the money if there's nothing wrong with your current cat. When I bought my car the cat was stuffed, and it was only about an extra $50 for a high flow instead of the standard one.
I've been told that ford I6 cats flow very well, but another option you could consider is to try one from a different model (i.e. 5.0 V8s, even Gen3's). The advantage of this is that almost any cat from any car can be attached to your existing exhaust system and it may work out cheaper than getting a new high flow one.
Lastly, if you're gonna gonna hollow out your cat, then get someone to weld a piece of straight pipe inside it, as it helps flow and significatly deepens the note. Having said this, I DO NOT recommend that you hollow out your cat, as if you are caught i think there is a minimum $5000 fine, not to mention the fact that the fumes from the cat-less exhaust will kill the environment (and people!).
yeah hollowing out your cat is a VERY BIG NO NO!!!!
use your standard cat, but get the exhaust shop to chop the ends off it so it is a 2.5" opening at both ends, thats the best way to go.
VT onwards cats are slightly bigger than equivalent falcon ones (i think its cause the V6 is less effiecient than the I6, due to old design, but thats my theory and is not proven in any way) so if you want you could get them to cut up a V6 cat, the genIIIs have two smaller cats so they are not an option.
i am getting a proper exhaust soon and i will be getting the V6 cat instead of re-using mine, but i got the commo one for free with only 60,000k on it, thats the main reason im using it...
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Just bash the guts out of it,
I'd be interested to hear of anyone who knows of either cops or the transport boys tearing your pipes out to have a look on the side of the road. keep a spare handy incase you get sent over the pits.
Can't say i've noticed a different smell, as for spanner tapping, it should have a crappy heat shield crimped on it. Still you could just lower the car enough so that you can't get you head past the sill unless its on a jack. the cops down there must be keener than up here.
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