Havng recently got a bargain on a nice big modern V I'm wondering how hard it will be to pass the OEM emissions test with a squirt and some universal cats - has anyone any experience?

more details perhaps?

V as in V5 (Volkswagen)

V as in Roman numeral 5 cylinder Volvo/Fiat/Ford engine

V as in V6

V as in V2 bike engine

V as in V4 bike engine

fair point. Was thinking V8's, primarily Audi's 4.2, but similar engines would count.

Damn, didn't think of v8 or v10

Why are you worried.
The manufacturers manage it without any problems, just copy them and use a cat etc.

I'd worry more about v twin bikes where the emission rules are a bit lazy.

Worried as I am trying to identify how much I can "get away with". I'm trying to see what sizes of cats are available (meow!) and how effective they are. I've seen a few posts on here where people have used multiple cats in series I think, which would get costly with a big V8, and I'm trying to minimise packaging problems. Just trying to get a handle on what I need I guess, save me having to do it twice.

Maybe I'm confused here but, your first post says you've just GOT a big V and your second says you're THINKING about an Audi V8....

V12?

You'll have to (further) excuse my ignorance, but why would a 'V' engine have a different emissions output from that of an inline engine with the same number of cylinders?

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Maybe I'm confused here but, your first post says you've just GOT a big V and your second says you're THINKING about an Audi V8....

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