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Old 08-01-2002, 05:29   #1 (permalink)
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Exhaust 2.25 or 2.5"

I have rung around places in melbourne asking for their advice about whether a 2.25 exhaust is beeter than a 2.5 exhaust.

Now i have a stock carby xf with a hollow cat and xtractors

Some guys have said and i quote "Bigger is better mate" and others say the 2.25 is the way to go.

My mechanic reckons that 2.25 is the better option cuz he reckons that the 2.5 is too big and should be used for a small stock 8 or a turbo....

What do u guys and gals reckon?
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Old 08-01-2002, 08:11   #2 (permalink)
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2.25" is the way to go with xf's. The 2.5" is usually way too loud, especially if you are running a hollow cat, and you won't see any improvement over a 2.25".
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Old 08-09-2002, 16:22   #3 (permalink)
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2.25" is the only way to go !!

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Old 08-09-2002, 22:32   #4 (permalink)
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Now.. im going against everyone else whos replied in this thread... but I've got a 2.5" stainless mandrel bent system from the Lukey extractors back, with a 3" tip on the end. I wouldnt say that its too loud on mine, and its an auto too.. so in theory it should be very droney, but its not.

The only bad thing about having the 2.5" with a real low XF is that when i have anyone on the back of my car it lowerers it just that little bit extra and the exhaust touches the diff on road bumps and you hear a *clunk* sound :) (coz the exhaust goes over the diff)

But I must confess, even my cousin who knows quite a lot about cars suggested for me to get the 2.25" coz he knows someone who put an xf on the dyno with a 2.25 and then put a 2.5 on the car.. and apparently there was no difference.. or maybe the 2.25 was better! I cant remember. :oo1:

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